Phospholipids are essential molecules that make up the cell membrane, providing structure and protection to cells. Each phospholipid consists of a hydrophilic (water-attracting) "head" and two hydrophobic (water-repelling) "tails." This unique structure allows phospholipids to arrange themselves into a bilayer, with the heads facing outward towards the water and the tails tucked away from it, creating a barrier that regulates what enters and exits the cell. The composition of phospholipids can vary depending on the type of cell and its function. For example, in neurons, certain phospholipids help in transmitting signals, while in muscle cells, they play a role in energy storage. This diversity in phospholipid composition is crucial for