What are lipids and what 2 parts do they all have?

Lipids are are inorganic compound that are poorly soluble in water, that consists of fat and oil. All lipids contain carbon, hydrogen, and oxygen. Some of them also contain nitrogen and phosphorus. The four main classes of lipids are fats, waxes, sterols, and phospholipids. The two parts make up lipids are glycerol and fatty acid.