Lipids comes from the Greek lipos, meaning fat. All lipids have the same basic chemical elements, but in different proportions, and they are insoluble in water. Besides forming pot bellies and love handles, they provide us with an energy reserve, insulation, and a protective layer for delicate organs. Also, triglycerides are the most abundant lipids in nature and are found in almost everything we eat.
Phospholipids are body fats, too.
But they are not nearly as abundant as triglycerides. The main job of phospholipids to form part of the structure of cell membranes. Lipoproteins are composed of protein and a mixture of triglycerides, phospholipids, and cholesterol. Lipoproteins transport lipids through the bloodstream to various parts of the body. We hear most about them in relationship to cholesterol, which is transported by two types of lipoprotein.