Triacylglycerols, free and esterified cholesterol and phospholipids, present in lipoproteins in blood plasma. Chylomicrons consist mainly of triacylglycerols and protein; they are the form in which lipids absorbed in the small intestine enter the bloodstream. Very low- density lipoproteins (VLDL) are assembled in the liver and exported to other tissues, where they provide a source of lipids. Lipid-depleted VLDL becomes low-density lipoprotein (LDL) in the circulation; it is rich in cholesterol and is normally cleared by the liver. High-density lipoprotein (HDL) contains cholesterol from LDL and tissues that is returned to the liver.
A general term for fats that includes the various types of cholesterol and the triglycerides.
Fat found in foods. Sources are both animal and vegetable products.
Fatty Acids, Phospholipids, and Cholesterol. The lipids are a group of compounds that are insoluble in water and soluble in such solvents as diethyl ether, carbon tetrachloride, alcohol, chloroform, and benzene. They are present in various amounts in all living cells. Nerve cells and adipose cells are rich in lipid content; muscle cells and epithelial cells have less.