What is the primary function of phospholipids in the body?

Phospholipids play a crucial role in forming the structural basis of cell membranes, which is why their primary function is associated with cell membrane structure. They consist of a hydrophilic (water-attracting) "head" and two hydrophobic (water-repelling) "tails," allowing them to arrange themselves into bilayers. This arrangement creates a semi-permeable membrane that not only protects the internal environment of the cell but also regulates what enters and exits the cell. The unique structure of phospholipids enables the formation of lipid bilayers, which are fundamental to the integrity and functionality of all cell types in the body.

While phospholipids contribute to various biological functions, energy storage is primarily attributed to triglycerides and carbohydrates, and hormone production is generally linked to steroid hormones derived from cholesterol. Muscle repair involves various proteins and amino acids for tissue restoration and does not primarily rely on phospholipids. Therefore, the association of phospholipids with cell membrane structure underlines their significance in maintaining cellular integrity and function.