the liver

The Liver is the largest internal organ in the human body. The liver is the body's processing and “manufacturing” plant. It has hundreds of roles but the most important is adjusting and monitoring the chemical composition of your blood, breaking down food to convert it into energy when you need it. It also helps you fight infections. Its dark color is because of a rich blood supply. In the average adult is is about 8 inches wide, 6.5 inches long and 4.5 inches thick and weighs approximately 3.5 pounds (1.6 kilograms).The livers contribution directly to digestion is the supply of bile to the small intestine. It stores, reroutes, and transforms nutrients that have been absorbed into the bloodstream from the digestive system. Without the liver every time you eat could release high levels of sugars and nutrients into the bloodstream that could be deadly. One reason your liver might fail is because of excessive drinking (alcohol). Your liver should contain some fat but if it has a fat percentage over 10% then you have what is called a fatty liver and will develop complications. This can be a result of eating fatty unhealthy foods like Mcdonalds excessively.
The liver takes blood from two sources (oxygen-rich) blood from the heart and (oxygen-poor but food-rich) blood from the alimentary canal (the whole passage along which food passes through the body from mouth to anus). Inside the liver the two streams mix and the blood makes its way back to heart. Hepatocytes are cells that are organized into thousands of six-sided units called lobules. They are about the size of a sesame seed. Inside the lobule sheets of hepatocytes line the “maze” (leaky capillaries) that converge in towards the central vein. The corners of the lobules there are three vessels, two carrying blood into liver and one carrying bile out. An arteriole brings blood from the heart a venule brings blood from the alimentary canal. Blood passes through the leaky capillaries on its way to the central vein,