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Lipids generally include neutral fats (triglycerides), phospholipids and cholesterol. Triglycerides are used mainly to provide energy for the different metabolic processes of the body. Cholesterol, phospholipids and small amounts of triglycerides are used to form the membranes of all cells of the body and to perform other cellular functions.
The end-products of fat digestion – monoglycerides and fatty acids – pass through intestinal epithelial cells during which time they are re-synthesized into new molecules of triglycerides which aggregate and enter lymph as minute droplets called chylomicrons. Most of cholesterol and phospholipids absorbed also join the chylomicrons. Chylomicrons are removed from circulating blood as they pass through blood capillaries of adipose tissue and liver. These two tissues contain large quantities of the enzyme lipoprotein lipase which hydrolyses the triglycerides of chylomicrons, releasing fatty acids and glycerol. These fatty acids diffuse into liver and fat cells where they are re-synthesized into tri-glycerides.
Large quantities of fats are therefore stored in two major tissues – liver and adipose tissue. The adipose tissue stores triglycerides until they are needed to provide energy elsewhere in the body. The liver also plays a role in degrading fatty acids into small compounds that can be used for energy.
sharon kalunda answered the question on February 25, 2019 at 14:11
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