fat
Fat (fat) is solid at room temperature grease (liquid oil at room temperature is called oil), mostly from human and animal body fat tissue, is a carboxylic acid ester, by the carbon, hydrogen, oxygen three elements The Unlike carbohydrates, fat contains a higher proportion of carbon and hydrogen, while the proportion of oxygen is low, so the heat is higher than the sugar. Fat is the final product of cholesterol (the formation of thrombosis). Adipose tissue is the vast majority of vertebrate-specific structure, can make a period of time do not eat, and not energy exhaustion and death; fat body is insect-specific, the main metabolic similar vertebrate liver. Fat is composed of glycerol and fatty acid triglyceride, which glycerol molecules are relatively simple, and the type and length of fatty acids are not the same, including saturated fatty acids, monounsaturated fatty acids, polyunsaturated fatty acids. Edible fat is a person can directly eat or cooking oil, the main component is triglyceride, which is neutral fat. Fat is one of the common food nutrients, is also one of the three kinds of energy to provide nutrition. ...