When people talk about fats, they are usually referring to the mixture of fatty acids in a substance. Fatty acids are broken down into three subgroups based on their chemical structure. Phospholipids - are similar to triglycerides except the third fatty acid has choline and and phosphate group. These differences make phospholipids emulsifiers - able to mix fatty substances with water soluble substances. Sterols cholesterol - is a waxy substance produced by the liver and found in foods of animal origin.
Cholesterol is formed from multi-ring structures.
Bile - a definition from Knowledge Adventures gallstones are formed in the gallbladder from concentrated bile. Lipoproteins - are mixtures of triglycerides, phospholipids, cholesterol, and protein. They contain the highest concentration of triglycerides of all the LP's. Their function is to provide triglycerides to cells to be used for energy, or stored as fat. High serum levels of LDL increases your risk atherosclerotic cardiovascular disease.