人体五脏的作用（The role of the human body）.doc

人体五脏的作用（The role of the human body） The five internal organs of the human body Heart is the engine of the human body hearts role is to promote blood flow, provide adequate blood flow to organs, tissues, to supply oxygen, and a variety of nutrients, and take away the metabolic end products (such as carbon dioxide, urea and uric acid, etc.), the cell to maintain normal metabolism and function. In all sorts of endocrine hormone and some other humoral factors, also want to through the circulation of the blood will be transported to the target cells, they realize the humoral regulation of the body, maintain the bodys internal environment is relatively constant. In addition, the realization of the function of blood defense, as well as the adjustment of the temperature is relatively constant, also depend on the blood cycle flow within the blood vessels, and blood circulation is due to the role of the heart pump. Adult heart weighs about 300 grams, its role is enormous, for example, a person in a quiet state, the heart jump about 70 times per minute, each pump 70 ml, is about 5 liters of blood pump per minute, so calculate one pump blood to the heart of lifes work, equivalent to about 30000 kg object is lifted up to the peak of the Himalayas. The liver Chemical plant The liver is the bodys largest glands, it in human metabolism, bile formation, detoxification, blood coagulation, immune, heat generation and the regulation of water and electrolyte in both plays a very important role, is the body of a huge chemical plant. 1. Metabolic function: Sugar metabolism: the starch and sugar in the diet are digested by sugar and then digested by the intestinal tract, and the liver is stored as liver glycogen. When the body needs, liver cells can decompose glycogen to glucose for the body to use. Protein metabolism: the liver is the only synthetic organ of human albumin. The formation, maintenance and regulation of globulin, enzyme proteins and plasma proteins other than gamma-balls are