Price Determination in Market Forces of Demand and Supply

Price Determination in Market Forces of Demand and Supply Introduction It is inevitable that world prices of commodities are increasing substantially. The increase of commodity prices does not only affect producers and consumers, but also governments. Around the world, governments face renewed pressure to reform their budgeting processes, including Malaysia. Malaysia has a well-established infrastructure and is one of the most economically advanced countries in South Asia. This essay is opted to discuss the rational of price hikes and its impacts to the cost of living particularly in the Malaysian context as well as providing the blueprint for Malaysian government in bracing the price hikes. 2.0 Do Oil Price Increases Cause Higher Other Commodity Prices? Current commodity price hikes are not only affecting the Malaysian economy and society, but also affecting the whole world. According to OECD Economics Department Policy Notes, commodity prices have risen considerably since mid-2010. The rational of price hikes is due to the price hikes of world’s primary sources like crude oil, food, steel, wheat and such. Oil is one of the world’s basic necessities and the backbone of most countries, especially developing countries, as some developed countries do have renewable resources as alternatives in their productions of commodities. OECD Economics Department Policy Notes states that higher energy prices have contributed to rising food prices, because energy accounts for over one-third of the cost of grain production. 2.1 Scarcity of Oil as One of the Important Natural Resources This is further encouraged by the scarcity of natural resources and raw materials. It is expected that world supply and production of oil are falling into depletion. This problem is commonly referred to as â€Å"peak oil†, where the production of oil reaches a maximum and will subsequently begin to decline until full depletion is ultimately reached. According to Hassan (2010), it is expected that the world’s oil supply will be completely diminished by 2025. Prices are Set by Both International and Local Market Factors Commodity prices are largely determined by international market powers within regional basis at most of the time. This shows that commodity prices are in-part out of government’s control in most countries around the world including Malaysia. 3.1 Mixed Economy in Malaysia Malaysia is practicing a mixed economic system and not exempted by international price changes. The economic activities in Malaysia are carried out by entrepreneurs in the production activities of goods and services as well as by the government that provides public goods and services to Malaysian citizens in terms of education, transportation, health and others. Based on Price Control Act 1961, Malaysian government is controlling only seven types of goods—white refined sugar, petrol, diesel, liquid petroleum gas, flour, cooking oil, and facemask (as illustrated in table 1). According to Ministry of Domestic Trade, Co-operatives and Consumerism, Malaysian government previously controlled other five goods which are steel (price control was repealed on 12 May 2008), chicken (price control was repealed on 12 May 2008), cement (price control was repealed on 5 June 2008), sweetened condensed milk (price control was repealed on 1 April 2009) and white bread (price control was repeale d on 1 Jan 2010). Table 1: List of Controlled Goods Source: Ministry of Domestic Trade, Co-operatives and Consumerism (MDTCC) Commodity Price Increases in Malaysia According to Datuk Dr. Wee Ka Siong, Ayer Hitam MP and MCA Deputy President, 2014 is seen as a tough year for Malaysians as the prices hikes, including the impending ones that impacting the middle-income earners and below (Foong, 2014). The price hikes are assumed as one of the impacts of the Malaysian government’s rationalisation exercise of fuel subsidies and the electricity tariff in the effort of reducing the nation’s economic burden. 4.1 Reducing Nation’s Economic Burden The Malaysia’s federal government is in a bad state because it is spending more than it earns, causing a persistent budget deficit. Malaysia’s debt-to-GDP ratio is higher than officials would like. With the exception of India, that deficit burden is the highest among the Non-Japan Asian economies (KPMG, 2011). According to Deputy of Ministry of Finance Datuk Ahmad Maslan, at the end of June 2013, the federal government owed tax of RM 284.7 billion, which is 28.8% of Malaysian GDP (Bernama, 2013). Until September 30, 2013, the shortfall is funded by the federal government incurring more debt, which was in total of RM529.2 billion or 53.6% of GDP (Bernama, 2013). 4.2 Subsidy Removal According to Shanmugam, â€Å"In Malaysia, the electricity tariff, food prices and toll rates on urban highways are all going up in 2014 as the government cuts subsidies and reigns in its operating expenditure†. Scrapping energy subsidies has become a target for government austerity measures over the past years. In complying with the latest budget, Malaysia has recently cut its annual subsidy on petrol and electricity (The Economist, 2014). Malaysia slashed its petrol subsidies by 20 cents a litre and by 20 to 80 cents on diesel (BBC News, 2013). This is the first time in more than two years that Malaysia cuts fuel subsidies as it tries to reduce its budget deficit. On the other hand, the electricity tariff in Malaysia is increased by an average of about 14.89% for Peninsular Malaysia, and by about 17% for Sabah and Labuan starting January 1st, 2014 as shown in Table 2 (Shagar, 2013). This is in line with the Government’s effort towards gradually reducing energy subsidi es to industries through the Subsidy Rationalisation Program. Table 2: The table on implications of the revised rate on domestic users Impacts of price hikes to Malaysian cost of living It is pretty clear that the cost of living in Malaysia is going to rise substantially as we stepped into 2014. According to Alliance Financial Group Bhd. and Malaysian Rating Corp., the 14 percent increase in sugar cost starting in October 2013 and 11 percent increase of petrol in September 2014 as well as 15 percent increase of electricity in January 2014 could inhibit private consumption growth by 0.9 percentage point in 2014 (Chong, 2014). Chong (2014) anticipates that Malaysia’s middle class is harshly hit by the price increases with elevated household borrowings as slower pay increase than the lower-income earners. According to Wan Saiful Wan Jan, the chief officer at the Institute for Democracy and Economic Affairs, with as little as RM 3,000 salary per month, the middle-income earners or the ‘Sandwich Class’ is not benefitting as much as other higher and lower classes from the government income tax cuts (Chong, 2014). Despite the increase cost of living, the Malaysian Employers Federation estimates that there will be lower salary increases as well as bonuses in the private sector in 2014, where executives will get a 5.63 percent average increase in salaries and non-executives will get a 5.65 percent raise as the results of an MEF survey of 257 companies (Choong, 2014). The producers are the ones that expected to gain much of the price hikes, especially for those who take advantage by their hidden charges through overprice selling of goods on consumers. However, Ministry of Domestic Trade, Co-operatives and Consumerism Ministry is taking serious actions to protect consumers’ rights. Figure 1: Food Prices Comparison between 2013 and 2014 Source: Utusan Online—3 January 2014 How do Malaysian government brace such increases in commodity prices? In many ways, Malaysia has been an early adopter of important financial reform programs. According to Shanmugam, the opposition has claimed that corruption and wastage are the main reasons the government is not able to spend within its means, thus increasing its spending that leads to high debt. Nevertheless, the technocrats in the Cabinet, Dato’ Seri Idris Jala and Dato’ Seri Abdul Wahid Omar say that Dato’ Seri Najib Razak’s administration has spelt out clear measures to tackle leakages in government spending and end corrupt practices. 6.1 Long-Term Agreement One of the ways that is taken by the Malaysian government in bracing the price increases is by having agreement with the resources supplying countries. For example, the government is able to control sugar price because of its long-term agreement with Brazil in supplying raw sugar to Malaysia. Nevertheless, sugar is pressured by price hikes due to the usage of sugar canes as primary supplier of raw sugar in biofuel (Department of Information, 2008). This causes sugar canes for the use of biofuel having high demand in the world market. Outcome-Based Budgeting The government has also introduced the Outcome-Based Budgeting (OBB) which is also known as Performance-Based Budgeting in Budget 2014 as a way to allocate resources based on achieving agreed upon objectives, program goals and measured results. This will help in improving the implementation of efficiencies, reducing redundancy and systematically evaluate the performance of all ministries. Furthermore, according to Dato’ Seri Abdul Wahid, the government is now more focusing on public-private partnerships, where the private sector implements the projects and end-users pay for it. He said that â€Å"there will be less emphasis on private finance initiatives (FPI) where the government has to pay annual lease payments, which contribute to a growing operating budget† (Shanmugam, 2013). Goods and Services Tax Goods and Services Tax (GST) is a broad based consumption tax which will generally be applicable on all goods and services, where consumers pay only on what they consume. Any registered business that charges GST can offset the GST it pays against the tax it collects before forwarding the balance to the government, so that the tax is ensured to be imposed only once. This is called as an â€Å"input tax credit mechanism†, where businesses are able to operate without tax cost and the final 6% tax is borne by the end consumer (Kumaran and Simpson, 2013). However, basic goods such as unprocessed meat, cooking oil, and sugar as well as public services like education, healthcare, tolls, financial services and life insurance will be exempt from GST (Kumaran and Simpson, 2013). This will help Malaysians in curbing their expenses with the increasing living cost. Furthermore, under the Price Control and Anti-Profiteering Act 2010, it is illegal for businesses to increase prices by 4% across the board with the introduction of GST (Kumaran and Simpson, 2013). Pricing decisions by businesses are also obliged to be justifiable or else stringent penalties will be taken by domestic trade cooperatives and consumerism ministry. In brief, instead of making everything more expensive in addition to international price hikes, GST is going to help Malaysians by providing a more transparent, streamlined and fairer tax based on our consumption patterns (Kumaran and Simpson, 2013). Conclusion In conclusion, despite the drawbacks of price hike to the cost of living particularly in the Malaysian context, price hikes are seen as a good cause in reducing the government’s burden. The government does need to reduce its fiscal deficit for the long term economic wellbeing. Therefore, cuts in government subsidies executed by the Malaysian government are viewed as a rational approach. Based on the blueprint discussed in this essay, it shows that the government also has proposed some measures to curb the impacts of price hikes to consumers. The government and its people are supposed to be partners in their shared journey of development and progress, thus both parties have to play their parts in fiscal consolidation. References BBC News. (2013, September 3). BBC NEWS BUSINESS. Retrieved from BBC: http://www.bbc.co.uk/news/business-23926411 Bernama. (2013, November 25). Hutang negara RM284.7b pada akhir Jun tahun ini, lapor Kementerian Kewangan. Retrieved from The Malaysian Insider: http://www.themalaysianinsider.com/bahasa/article/hutang-negara-rm284.7b-pada-akhir-jun-tahun-ini-lapor-kementerian-kewangan Chong, P. K. (2014, January 7th). Malaysians Seen Curbing Spending as Living Costs Surge: Economy. Retrieved from Bloomberg News: http://www.bloomberg.com/news/2014-01-07/malaysians-seen-curbing-spending-as-living-costs-surge-economy.html Choong, P. (2014, January 7). Malaysians Seen Curbing Spending as Living Costs Surge: Economy. Bloomberg News. Malaysia: Bloomberg L.P. Department of Information. (2008). Clarification on Subsidies and Price Increases of Goods and Services. Kuala Lumpur: Perkasa Nilam Sdn. Bhd. Foong, P. (2014, January 6). Malaysian Politics 2014: Tough explaining price hikes to people, says Dr Wee. Retrieved from The Star Online: http://www.thestar.com.my/News/Nation/2014/01/06/Malaysian-politics-2014-Wee-Ka-Siong-MCA-Barisan-Nasional/ Hassan, M. (2010, July 19). Bersediakah kita menuju negara hijau? Retrieved from Utusan Online: http://www.utusan.com.my/utusan/info.asp?y=2010dt=0719pub=Utusan_Malaysiasec=Rencanapg=re_06.htm KPDNKK. (2014, January 10). Price List of Controlled Items. Retrieved from Offical Portal of Ministry of Domestic Trade, Co-operatives and Consumerism: http://www.kpdnkk.gov.my/en/pengguna/penguatkuasaan/brg-kawalan/harga-brg-kawalan KPMG. (2011, September). Outcome-based Budgeting: A Six Nation Study. Making the Transition. KPMG International Cooperative. Kumaran, R., Simpson, T. (2013, October 21). Real impact of GST on cost of living. Retrieved from The Star Online: http://www.thestar.com.my/Business/Business-News/2013/10/21/Real-impact-of-GST-on-cost-of-living-It-helps-change-the-way-we-pay-tax-provides-more-transparent-s.aspx/ Organisation for Economic Co-operation and Development. (2011). The Effects of Oil Price Hikes on Economic Activity and Inflation. Economics Department Policy Note No. 4. OECD. Shagar, L. K. (2013, December 2). Electricity tariff up by average 15% from Jan 1. The Star. Malaysia: Star Publications (M) Bhd. Shanmugam, M. (2013, December 23). Shake-up in the economy. Malaysia: The Edge Malaysia Weekly. Star Publications (M) Bhd. (2014, January 21). Traders to pay for steep prices. Retrieved from The Star Online: http://www.thestar.com.my/News/Nation/2014/01/21/Traders-to-pay-for-steep-prices-Shop-owners-will-be-taken-to-court-if-they-violate-regulation/ Tenaga Nasional Berhad. (2014). Tariff Rates. Retrieved from Tenaga Nasional: http://www.tnb.com.my/residential/pricing-and-tariff/tariff-rates.html The Economist. (2014, Jan 11th). Fuelling controversy. The $9 Trillion Sale (Almost) Everything Must Go! The Economist Newspaper Limited. The copyright of Nur Nisrin Alina Abdul Aziz (MBA Services Management, UniRazak)Page 1

The Tragedy Of Julius Caesar - Tragic Hero :: essays research papers

The Tragedy of Julius Caesar - Tragic Hero Essay In the play The Tragedy of Julius Caesar by William Shakespeare, I saw two main characters as tragic heroes. First, I saw Julius Caesar as a tragic hero because his will to gain power was so strong that he ended up losing his life for it. The fact that he could have been such a strong leader was destroyed when he was killed by conspirators. I saw Marcus Brutus as a second tragic hero in this play. Brutus was such a noble character that did not deserve to die. The main reason why he did die, however, was because he had led a conspiracy against Caesar and eventually killed him. These two characters were the tragic heroes of the play in my opinion.   Ã‚  Ã‚  Ã‚  Ã‚  Both Caesar and Brutus were main characters in this play. Two sides formed during the play, and these two characters were the leaders of each side, respectively. Also, each character held a high rank in the Roman society. Caesar was the ruler of the Roman Empire, and could basically do whatever he wanted due to his outstanding power. Brutus was a general for the Empire and he was respected and was seen as a noble man and true â€Å"Roman† by many.   Ã‚  Ã‚  Ã‚  Ã‚  Caesar and Brutus were truly noble people. Caesar was a dignified and courageous man. He gained his power through hard work and courage. However, Caesar was marked by a weakness: he wanted too much power. This weakness proved to be fatal in the play. Brutus, on the other hand, was a strong leader throughout the whole play. People listened to him easily and he showed his nobility by always being open to others. Despite his good character, he did make one fatal mistake in judgment. He killed Caesar thinking he would gain too much power, yet it was truly his friend Cassius’s jealously of Caesar that truly snared him into the conspiracy.   Ã‚  Ã‚  Ã‚  Ã‚  Each of the two characters gained some kind of wisdom before they came to an unhappy end. Caesar found out that one of his best friends, Brutus, had betrayed him just seconds before he died from the daggers of the conspirators. Brutus also learns something before he dies. When he knows that Cassius had committed suicide, he too commits suicide. He knew that be doing that, Caesar’s ghost was truly avenged.

Why Study Skills Are Important

Study skills are important to maintain. Study skills help you excel in your academic career. They help you remember and learn new information. They also help you do well in your assignments, quizzes, and tests. That helps you pass to the next grade. You might ask, what are study skills? Examples of good study skills are classroom behavior, time management, organization, and memorization. Good classroom behavior includes active listening. Hearing is not listening.When you listen critically you are trying hard to learn something and you are sitting up straight and taking notes. Keep your eyes on the teacher, ignore noises and movements from others, and avoid daydreaming. Taking notes is good classroom behavior as well as making sure to socialize at appropriate times such as during breaks. As I previously stated time management is a study skill. Write down all homework and assignments along with their due dates in your agenda or planner.Make sure to Write down test dates, quiz dates, an d project due dates in your agenda or planner as well. Also, put all due dates down in your agenda or planner on the day before they are due as a reminder. Take the quiz dates, test dates, and project due dates from your agenda and write them on a calendar at home. Decide how much time you will spend studying after school and how often. Furthermore designate the specific time of day and the actual days for your study time. Memorization is also a study skill.Memorization includes reading notes aloud several times to yourself, and trying to connect the information to something familiar. Making acronyms, note cards, and your own quizzes from your notes can also help you memorize things. Organization is an important study skill that includes notebook organization, organizing your study place, and organizing your goals. To organize your notebooks keep a separate folder or notebook for each class. Put all homework assignments in one spot as well. Put all papers & classwork neatly in the p roper place, and straighten out your binder every Friday.Study skills are important because you use them to excel in you school work. Study skills include classroom behavior, time management, organization, and memorization. You need to listen in class if you want to learn. Time management is important because you have to turn assignments in on time in order to get a good grade. Organization is important because you need to know where your assignments and notes are. All of the above is important because they are all study skills. You need good study skills in order to excel in school.

Anatomy And Physiology Of Ckd - Free Essay Example

Sample details Pages: 9 Words: 2763 Downloads: 7 Date added: 2017/09/25 Category Advertising Essay Type Narrative essay Topics: Anatomy Essay Did you like this example? ANATOMY AND PHYSIOLOGY Chronic Kidney Disease Cardiovascular System The cardiovascular system is sometimes called the circulatory system. It consists of the heart, which is a muscular pumping device, and a closed system of vessels called arteries, veins, and capillaries. As the name implies, blood contained in the circulatory system is pumped by the heart around a closed circuit of vessels as it passes again and again through the various circulations of the body. The Heart * The heart is enclosed by a sac known as the pericardium. There are three layers of tissues that form the heart wall. The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium. The internal cavity of the heart is divided into four chambers: * Right atrium * Right ventricle * Left atrium * Left ventricle * The two atria are thin-walled chambers that receive blood from the veins. The two ventricles are thick-walled chambers that forcefu lly pump blood out of the heart. Differences in thickness of the heart chamber walls are due to variations in the amount of myocardium present, which reflects the amount of force each chamber is required to generate. The right atrium receives deoxygenated blood from systemic veins; the left atrium receives oxygenated blood from the pulmonary veins. Valves of the Heart Pumps need a set of valves to keep the fluid flowing in one direction and the heart is no exception. The heart has two types of valves that keep the blood flowing in the correct direction. The valves between the atria and ventricles are called atrioventricular valves (also called cuspid valves), while those at the bases of the large vessels leaving the ventricles are called semilunar valves. The right atrioventricular valve is the tricuspid valve. The left atrioventricular valve is the bicuspid, or mitral, valve. The valve between the right ventricle and pulmonary trunk is the pulmonary semilunar valve. The valve between the left ventricle and the aorta is the aortic semilunar valve. When the ventricles contract, atrioventricular valves close to prevent blood from flowing back into the atria. When the ventricles relax, semilunar valves close to prevent blood from flowing back into the ventricles. Pathway of Blood through the Heart While it is convenient to describe the flow of blood through the right side of the heart and then through the left side, it is important to realize that both atria contract at the same time and both ventricles contract at the same time. The heart works as two pumps, one on the right and one on the left, working simultaneously. Blood flows from the right atrium to the right ventricle, and then is pumped to the lungs to receive oxygen. From the lungs, the blood flows to the left atrium, then to the left ventricle. From there it is pumped to the systemic circulation. Blood Supply to the Myocardium The myocardium of the heart wall is a working muscle that needs a continuous supply of oxygen and nutrients to function with efficiency. For this reason, cardiac muscle has an extensive network of blood vessels to bring oxygen to the contracting cells and to remove waste products. The right and left coronary arteries, branches of the ascending aorta, supply blood to the walls of the myocardium. After blood passes through the capillaries in the myocardium, it enters a system of cardiac (coronary) veins. Most of the cardiac veins drain into the coronary sinus, which opens into the right atrium. Blood Vessels Blood vessels are the channels or conduits through which blood is distributed to body tissues. The vessels make up two closed systems of tubes that begin and end at the heart. One system, the pulmonary vessels, transports blood from the right ventricle to the lungs and back to the left atrium. The other system, the systemic vessels, carries blood from the left ventricle to the tissues in all parts of the body and then returns the blood to t he right atrium. Based on their structure and function, blood vessels are classified as either arteries, capillaries, or veins. Arteries Arteries carry blood away from the heart. Pulmonary arteries transport blood that has a low oxygen content from the right ventricle to the lungs. Systemic arteries transport oxygenated blood from the left ventricle to the body tissues. Blood is pumped from the ventricles into large elastic arteries that branch repeatedly into smaller and smaller arteries until the branching results in microscopic arteries called arterioles. The arterioles play a key role in regulating blood flow into the tissue capillaries. About 10 percent of the total blood volume is in the systemic arterial system at any given time. The wall of an artery consists of three layers. The innermost layer, the tunica intima (or just intima), contains simple squamous epithelium, basement membrane and connective tissues. The epithelium is in direct contact with the blood flow. The middle layer, the tunica media, is primarily smooth muscle and is usually the thickest layer. It not only provides support for the vessel but also changes vessel diameter to regulate blood flow and blood pressure. The outermost layer, which attaches the vessel to the surrounding tissue, is the tunica externa or tunica adventitia. This layer is connective tissue with varying amounts of elastic and collagenous fibers. The connective tissue in this layer is quite dense where it is adjacent to the tunic media, but it changes to loose connective tissue near the periphery of the vesse Veins Veins carry blood toward the heart. After blood passes through the capillaries, it enters the smallest veins, called venules. From the venules, it flows into progressively larger and larger veins until it reaches the heart. In the pulmonary circuit, the pulmonary veins transport blood from the lungs to the left atrium of the heart. This blood has a high oxygen content because it has just been oxyge nated in the lungs. Systemic veins transport blood from the body tissue to the right atrium of the heart. This blood has a reduced oxygen content because the oxygen has been used for metabolic activities in the tissue cells. The walls of veins have the same three layers as the arteries. Although all the layers are present, there is less smooth muscle and connective tissue. This makes the walls of veins thinner than those of arteries, which is related to the fact that blood in the veins has less pressure than in the arteries. Because the walls of the veins are thinner and less rigid than arteries, veins can hold more blood. Almost 70 percent of the total blood volume is in the veins at any given time. Medium and large veins have venous valves, similar to the semilunar valves associated with the heart, that help keep the blood flowing toward the heart. Venous valves are especially important in the arms and legs, where they prevent the backflow of blood in response to the pull of gravity. Capillaries Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells. Capillary distribution varies with the metabolic activity of body tissues. Tissues such as skeletal muscle, liver, and kidney have extensive capillary networks because they are metabolically active and require an abundant supply of oxygen and nutrients. Other tissues, such as connective tissue, have a less abundant supply of capillaries. The epidermis of the skin and the lens and cornea of the eye completely lack a capillary network. About 5 percent of the total blood volume is in the systemic capillaries at any given time. Another 10 percent is in the lungs. Smooth muscle cells in the arterioles where they branch to form capillaries regulate blood f low from the arterioles into the capillaries. Role of the Capillaries In addition to forming the connection between the arteries and veins, capillaries have a vital role in the exchange of gases, nutrients, and metabolic waste products between the blood and the tissue cells. Substances pass through the capillaries wall by diffusion, filtration, and osmosis. Oxygen and carbon dioxide move across the capillary wall by diffusion. Fluid movement across a capillary wall is determined by a combination of hydrostatic and osmotic pressure. The net result of the capillary microcirculation created by hydrostatic and osmotic pressure is that substances leave the blood at one end of the capillary and return at the other end. Urinary System The principal function of the urinary system is to maintain the volume and composition of body fluids within normal limits. One aspect of this function is to rid the body of waste products that accumulate as a result of cellular metabolism. Other aspect s of its function include regulating the concentrations of various electrolytes in the body fluids and maintaining normal pH of the blood. In addition to maintaining fluid homeostasis in the body, the urinary system controls red blood cell production by secreting the hormone erythropoietin. The urinary system also plays a role in maintaining normal blood pressure by secreting the enzyme renin. The urinary system consists of the kidneys, ureters, urinary bladder, and urethra. The kidneys form the urine and account for the other functions attributed to the urinary system. The ureters carry the urine away from kidneys to the urinary bladder, which is a temporary reservoir for the urine. The urethra is a tubular structure that carries the urine from the urinary bladder to the outside. Kidneys The kidneys are the primary organs of the urinary system. The kidneys are the organs that filter the blood, remove the wastes, and excrete the wastes in the urine. They are the organs that perfo rm the functions of the urinary system. The other components are accessory structures to eliminate the urine from the body. The paired kidneys are located between the twelfth thoracic and third lumbar vertebrae, one on each side of the vertebral column. The right kidney usually is slightly lower than the left because the liver displaces it downward. The kidneys protected by the lower ribs, lie in shallow depressions against the posterior abdominal wall and behind the parietal peritoneum. This means they are retroperitoneal. Each kidney is held in place by connective tissue, called renal fascia, and is surrounded by a thick layer of adipose tissue, called perirenal fat, which helps to protect it. A tough, fibrous, connective tissue renal capsule closely envelopes each kidney and provides support for the soft tissue that is inside. In the adult, each kidney is approximately 3 cm thick, 6 cm wide, and 12 cm long. It is roughly bean-shaped with an indentation, called the hilum, on the medial side. The hilum leads to a large cavity, called the renal sinus, within the kidney. The ureter and renal vein leave the kidney, and the renal artery enters the kidney at the hilum. The outer, reddish region, next to the capsule, is the renal cortex. This surrounds a darker reddish-brown region called the renal medulla. The renal medulla consists of a series of renal pyramids, which appear striated because they contain straight tubular structures and blood vessels. The wide bases of the pyramids are adjacent to the cortex and the pointed ends, called renal papillae, are directed toward the center of the kidney. Portions of the renal cortex extend into the spaces between adjacent pyramids to form renal columns. The cortex and medulla make up the parenchyma, or functional tissue, of the kidney. The central region of the kidney contains the renal pelvis, which is located in the renal sinus and is continuous with the ureter. The renal pelvis is a large cavity that colle cts the urine as it is produced. The periphery of the renal pelvis is interrupted by cuplike projections called calyces. A minor calyx surrounds the renal papillae of each pyramid and collects urine from that pyramid. Several minor calyces converge to form a major calyx. From the major calyces the urine flows into the renal pelvis and from there into the ureter. Each kidney contains over a million functional units, called nephrons, in the parenchyma (cortex and medulla). A nephron has two parts: a renal corpuscle and a renal tubule. The renal corpuscle consists of a cluster of capillaries, called the glomerulus, surrounded by a double-layered epithelial cup, called the glomerular capsule. An afferent arteriole leads into the renal corpuscle and an efferent arteriole leaves the renal corpuscle. Urine passes from the nephrons into collecting ducts then into the minor calyces. The juxtaglomerular apparatus, which monitors blood pressure and secretes renin, is formed from modified ce lls in the afferent arteriole and the ascending limb of the nephron loop. Ureter Each ureter is a small tube, about 25 cm long, that carries urine from the renal pelvis to the urinary bladder. It descends from the renal pelvis, along the posterior abdominal wall, behind the parietal peritoneum, and enters the urinary bladder on the posterior inferior surface. The wall of the ureter consists of three layers. The outer layer, the fibrous coat, is a supporting layer of fibrous connective tissue. The middle layer, the muscular coat, consists of inner circular and outer longitudinal smooth muscle. The main function of this layer is peristalsis to propel the urine. The inner layer, the mucosa, is transitional epithelium that is continuous with the lining of the renal pelvis and the urinary bladder. This layer secretes mucus which coats and protects the surface of the cells. Urinary Bladder The urinary bladder is a temporary storage reservoir for urine. It is located in the pelvic ca vity, posterior to the symphysis pubis, and below the parietal peritoneum. The size and shape of the urinary bladder varies with the amount of urine it contains and with pressure it receives from surrounding organs. The inner lining of the urinary bladder is a mucous membrane of transitional epithelium that is continuous with that in the ureters. When the bladder is empty, the mucosa has numerous folds called rugae. The rugae and transitional epithelium allow the bladder to expand as it fills. The second layer in the walls is the submucosa that supports the mucous membrane. It is composed of connective tissue with elastic fibers. The next layer is the muscularis, which is composed of smooth muscle. The smooth muscle fibers are interwoven in all directions and collectively these are called the detrusor muscle. Contraction of this muscle expels urine from the bladder. On the superior surface, the outer layer of the bladder wall is parietal peritoneum. In all other regions, the o uter layer is fibrous connective tissue. There is a triangular area, called the trigone, formed by three openings in the floor of the urinary bladder. Two of the openings are from the ureters and form the base of the trigone. Small flaps of mucosa cover these openings and act as valves that allow urine to enter the bladder but prevent it from backing up from the bladder into the ureters. The third opening, at the apex of the trigone, is the opening into the urethra. A band of the detrusor muscle encircles this opening to form the internal urethral sphincter. Urethra The final passageway for the flow of urine is the urethra, a thin-walled tube that conveys urine from the floor of the urinary bladder to the outside. The opening to the outside is the external urethral orifice. The mucosal lining of the urethra is transitional epithelium. The wall also contains smooth muscle fibers and is supported by connective tissue. The internal urethral sphincter surrounds the beginning of th e urethra, where it leaves the urinary bladder. This sphincter is smooth (involuntary) muscle. Another sphincter, the external urethral sphincter, is skeletal (voluntary) muscle and encircles the urethra where it goes through the pelvic floor. These two sphincters control the flow of urine through the urethra. In females, the urethra is short, only 3 to 4 cm (about 1. 5 inches) long. The external urethral orifice opens to the outside just anterior to the opening for the vagina. In males, the urethra is much longer, about 20 cm (7 to 8 inches) in length, and transports both urine and semen. The first part, next to the urinary bladder, passes through the prostate gland and is called the prostatic urethra. The second part, a short region that penetrates the pelvic floor and enters the penis, is called the membranous urethra. The third part, the spongy urethra, is the longest region. This portion of the urethra extends the entire length of the penis, and the external urethral orifice opens to the outside at the tip of the penis. Don’t waste time! Our writers will create an original "Anatomy And Physiology Of Ckd" essay for you Create order