Where are lipids found?

Lipids are present in the bloodstream and distributed throughout the entire body, existing in every single cell. Some specific locations where lipids are found include: in the brain, triglycerides, phospholipids, and steroids. Within triglycerides, lipids are found in human and animal tissues, and function primarily as energy storage molecules and to provide insulation. In phospholipids, they are found in the cell membranes. These lipids create a double-layered membrane structure. Water-soluble molecules are positioned on the exterior, while water-insoluble molecules are shielded within. The primary functions of these lipids is to provide protection to the cell and regulate homeostasis. Within steroids, lipids are present in cellular membranes and endocrine and digestive systems. Cholesterol, which is the most abundant steroid lipid found in the body, is essential for the functioning of every cell in the body. Lipids, particularly phospholipids, are vital components of the myelin sheath that surrounds nerve cells in the brain. Myelin functions to provide insulation and facilitates efficient nerve signal transmission.