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Triglycerides are common lipids in nature and are classified as fat and oil. Fat are solid at room temperature and oil are liquid at room temperature . The higher the unsaturated condition of fatty acid, the higher the lipids formation also triglyceride are non polar so they donot dissolve in water due to presence of three hydrophobic tail and absence of OH group in glycerol and also triglyceride are lees denser than water and therore float. The following are the main functions of lipids;-

1. Lipids as an Energy Reserve: all of the energy needed by the human body is provided by the oxidation of carbohydrates and lipids. Whereas carbohydrates provide a readily available source of energy, lipids function primarily as an energy reserve.
The amount of lipids stored as an energy reserve far exceeds the energy stored as glycogen since the human body is simply not capable of storing as much glycogen compared to lipids.

2. Lipids or fats are stored in cells throughout the body principle in special kinds of connective tissue called adipose tissue or depot fat. Whereas many cells contain phospholipids in the bilayer cell membranes, adipose tissue cells consist of fat globules of triglycerides which may occupy as much as 90% of the cell volume.

3. Lipids ingested as food are digested in the small intestine where bile salts are used to emulsify them and pancreatic lipase hydrolyzes lipids into fatty acids, glycerol, soaps, or mono- and diglycerides. There is still some dispute about the lipid form that passes through the intestinal wall — whether as fatty acids or as glycerides. In either case, triglycerides are found in the lymph system and the blood

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