Lipid-metabolism

 Lipid metabolism is that the synthesis and degradation of lipids in cells, involving the breakdown or storage of fats for energy and therefore the synthesis of structural and functional lipids, such as those involved in the construction of cell membranes. In animals, these fats are obtained from food or are synthesized by the liver. Lipogenesis is the process of synthesizing these fats. The majority of lipids found within the physical body from ingesting food are triglycerides and cholesterol. Other sorts of lipids found within the body are fatty acids and membrane lipids. Lipid metabolism is usually considered because the digestion and absorption process of dietary fat; however, there are two sources of fats that organisms can use to get energy: from consumed dietary fats and from stored fat. Vertebrates (including humans) use both sources of fat to produce energy for organs such as the heart to function. Since lipids are hydrophobic molecules, they have to be solubilized before their metabolism can begin. Lipid metabolism often begins with hydrolysis, which occurs with the help of various enzymes in the digestive system. Lipid metabolism also occurs in plants, though the processes differ in some ways in comparison to animals. The second step after the hydrolysis is that the absorption of the fatty acids into the epithelial cells of the intestinal wall. In the epithelial cells, fatty acids are packaged and transported to the remainder of the body.