Human Liver Anatomy and Function

The liver is an important vital organ that also happens to be the largest internal organ in the body. Weighing between 3 and 3.5 pounds, the liver is located in the upper right area of the abdominal cavity and is responsible for hundreds of different functions. Some of these functions include nutrient metabolism, detoxification of harmful substances, and protecting the body from germs. The liver has a unique ability to regenerate itself. This ability makes it possible for individuals to donate part of their liver for transplantation. Liver Anatomy The liver is a reddish-brown organ that is located below the diaphragm and superior to other abdominal cavity organs such as the stomach, kidneys, gallbladder, and intestines. The most prominent feature of the liver is its larger right lobe and smaller left lobe. These two main lobes are separated by a band of connective tissue. Each liver lobe is internally composed of thousands of smaller units called lobules. Lobules are small liver segments containing arteries, veins, sinusoids, bile ducts, and liver cells. Liver tissue is composed of two main types of cells. Hepatocytes are the most numerous type of liver cells. These epithelial cells are responsible for most of the functions performed by the liver. Kupffer cells are immune cells that are also found in the liver. They are thought to be a type of macrophage that rids the body of pathogens and old red blood cells. The liver also contains numerous bile ducts, which drain bile produced by the liver into larger hepatic ducts. These ducts join to form the common hepatic duct. The cystic duct extending from the gallbladder joins the common hepatic duct to form the common bile duct. Bile from the liver and gallbladder drain into the common bile duct and are delivered to the upper portion of the small intestines (duodenum). Bile is a dark greenish or yellow fluid produced by the liver and stored in the gallbladder. It aids in the digestion of fats and helps eliminate toxic wastes. Liver Function The liver performs a number of vital functions in the body. A major function of the liver is to process substances in the blood. The liver receives blood from organs including the stomach, small intestines, spleen, pancreas, and gallbladder through the hepatic portal vein. The liver then processes, filters, and detoxifies the blood before sending it back to the heart via the inferior vena cava. The liver has a digestive system, immune system, endocrine system, and exocrine functions. A number of important liver functions are listed below. 1) Fat Digestion A key function of the liver is the digestion of fats. Bile produced by the liver breaks down fat in the small intestines so that it can be used for energy. 2) Metabolism The liver metabolizes carbohydrates, proteins, and lipids in the blood that are initially processed during digestion. Hepatocytes store glucose obtained from the break down of carbohydrates in the foods we eat. Excess glucose is removed from the blood and stored as glycogen in the liver. When glucose is needed, the liver breaks down glycogen into glucose and releases the sugar into the blood. The liver metabolizes amino acids from digested proteins. In the process, toxic ammonia is produced which the liver converts to urea. Urea is transported to the blood and is passed to the kidneys where it is excreted in urine. The liver processes fats to produce other lipids including phospholipids and cholesterol. These substances are necessary for cell membrane production, digestion, bile acid formation, and hormone production. The liver also metabolizes hemoglobin, chemicals, medications, alcohol and other drugs in the blood. 3) Nutrient Storage The liver stores nutrients obtained from the blood for use when needed. Some of these substances include glucose, iron, copper, vitamin B12, vitamin A, vitamin D, vitamin K (helps blood to clot), and vitamin B9 (aids in red blood cell synthesis). 4) Synthesis and Secretion The liver synthesizes and secretes plasma proteins that act as clotting factors and help to maintain proper blood fluid balance. The blood protein fibrinogen produced by the liver is converted to fibrin, a sticky fibrous mesh that traps platelets and other blood cells. Another clotting factor produced by the liver, prothrombin, is needed to convert fibrinogen to fibrin. The liver also produces a number of carrier proteins including albumin, which transports substances such as hormones, fatty acids, calcium, bilirubin, and various drugs. Hormones are also synthesized and secreted by the liver when needed. Liver-synthesized hormones include insulin-like growth factor 1, which aids in early growth and development. Thrombopoietin is a hormone that regulates platelet production in bone marrow. 5)Immune Defense The K​upffer cells of the liver filter the blood of pathogens such as bacteria, parasites, and fungi. They also rid the body of old blood cells, dead cells, cancer cells, and cellular refuse. Harmful substances and waste products are secreted by the liver into either the bile or the blood. Substances secreted into bile are eliminated from the body through the digestive tract. Substances secreted into the blood are filtered by the kidneys and excreted in urine.

Prostitution The Crime Of Prostitution - 1671 Words

Before conducting extensive research on the crime of prostitution I wrote down several different explanations that I believe explain why women participate in prostitution. Women participate in the act of prostitution for many reasons. First and foremost prostitution is known to be a very lucrative business, similar to the porn industry and stripping industry. Therefore, women participate in prostitution to make large amounts of money; in prostitution (like in any other profession) money is always the main motive. Some women participate in prostitution due to a severe lack of education. Many women become involved in prostitution because they do not possess a GED or a high school diploma. They either dropped out of school or they just never†¦show more content†¦Some women do not get to freely choose whether or not they want to become involved in prostitution. For this assignment I did some extensive research about the crime of prostitution. I watched many in-depth documentarie s about individuals who are currently involved in prostitution and ex prostitutes and from these documentaries I gathered some true reasons as to why so many women become involved in prostitution. In all the documentaries I viewed the main reason women stated they became prostitutes was because they either ran away from home or dropped out of school and was in desperate need for money. The women stated that they worked several jobs but the money was not sufficient enough to support themselves and/or their families so they became involved in prostitution in efforts to make fast and easy money. Another reason frequently stated by several women in the documentaries was that they became involved in prostitution due to their troublesome upbringings. Most women stated that they ran away from their homes due to the fact that they were constantly being molested at a very young age. The constant molestation at a young age had a negative impact on the women causing them to become involved in prostitution. In one documentary on www.youtube.com entitled â€Å" Prostitution: leaving the life† an ex-prostitute stated that â€Å" I decided to sell my body since it hadShow MoreRelatedIs Prostitution A Crime?968 Words   |  4 PagesWhat Is Prostitution? Prostitution is where people engage in a sexual activity with someone else for money. The whole subject of prostitution is full of ambiguities and hypocrisies; we generally think of the transfer of money as the element that makes prostitution a crime although money plays a subtle part in all sorts of sexual relationships. We define prostitution as systematic sexual violence and oppression against women and girls. The definition of prostitution includes not only the exchangeRead MoreIs Prostitution A Victimless Crime3179 Words   |  13 PagesIs prostitution a victimless crime and should this affect its legislation? 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They will now tell her sister that she owes more money a huge amount and unless she pays it off her sister will be forced to have to pim herselfRead MoreSex Trafficking : Prostitution, Crime And Exploitation2027 Words   |  9 PagesSex Traffic: Prostitution, Crime and Exploitation. The paper will look at the causes, consequences and prevalence rates of sex trafficking and will consider the impact of such factors as globalization and women’s poverty in perpetuating the problem or making it worse. The paper will conclude with a discussion of the ways in which a human rights perspective might translate into positive action to eliminate the trafficking of girls and women. Paola Monzini notes that prostitution and sex traffickingRead MoreLegalization Of Prostitution : Is It Really A Victimless Crime?1913 Words   |  8 PagesLegalization of Prostitution: Is It Really a Victimless Crime? The definition of prostitution, according to Merriam-Webster Dictionary, is â€Å"the work of a prostitute: the act of having sex in exchange of money,† and â€Å"the use of a skill or ability in a way that is not appropriate or respectable† (Merriam-Webster). The definition alone casts a shadow of negativity onto prostitution, plainly stating that it is wrong. The history of prostitution in America can be traced back to the founding days whenRead More Prostitution Should Be Legalized in Our Society1260 Words   |  5 PagesHow about prostitute? Although some people might think that prostitution is dirty job, prostitution is also one of the important jobs which are composing our society. Devaluation on prostitute recognition should be changed. This essay deals with reasons why prostitution should be allowed and what are the advantages of prostitution. First reason that prostitution should be legalized is for women’s right. As upper mentioned, prostitution is a kind of occupations. According to research among the women

Nucor Case Free Essays

NUCOR CASE In this analysis we use the Net present value to consider if Nucor should invest in the new technology called: thin slab minimill. NPV is really useful in order to make this kind of decision because it uses the concept of future cash value to evaluate whether the investment is worth, however the NPV is sometimes difficult to calculate because it is not always easy to estimate future cash flow. Considering the assumption I made in the first part of the spread sheet, the thin slab project doesn’t appear to be a wise investment for Nucor because the future cash flows at the present value are less than the initial cost of the investment. We will write a custom essay sample on Nucor Case or any similar topic only for you Order Now Comparing the NPV of the three different scenarios it is evident that the best option for Iverson is to continue whit the unmodernized process. The first consideration about to undertake the investment is based on particular assumptions about the future, if we change those the result of the decision could also change. Due to the fluctuation of the market is difficult to make the right assumptions and this is why to calculate the NPV is not easy. For instance if we changed the discount rate and we lower it below the IRR, the resulting NPV will be positive and this case to invest in the new technology could be a profitable decision. We can also change the steel price rate keeping the cost rate constant, if it is increased enough the NPV could result positive, at the same time if we reduce cost rate keeping the price rate constant we can find an equal result. Regarding the real option analysis if Nucor decides to wait it is unlikely that another will decide to make this kind of investment first. The follow strategy could be a wise decision for Nucor, because the NPV is slightly negative so the management could decide to undertake this investment in order to gain experience and subsequently use that experience for other plants so this initial price could generate future opportunities. How to cite Nucor Case, Essay examples