The category of organic molecules in the body called includes fatty acids, fats, phospholipids, steroids, and prostaglandins.

The category of organic molecules in the body that includes fatty acids, fats, phospholipids, steroids, and prostaglandins is known as lipids.

Lipids are a diverse group of hydrophobic molecules that play various essential roles in biological systems. They are primarily responsible for storing energy, forming cell membranes, and acting as signaling molecules. Lipids can be classified into several subcategories, including triglycerides (fats and oils), phospholipids (which form the cell membrane), sterols (such as cholesterol), and eicosanoids (including prostaglandins). Their hydrophobic nature makes them important for forming barriers in biological systems, allowing cells to maintain distinct internal environments.