Phospholipid metabolism refers to the processes by which cells synthesize and break down phospholipids, essential components of cell membranes. These molecules consist of two fatty acid tails and a phosphate group, allowing them to form bilayers that provide structural integrity and fluidity to membranes. Key enzymes, such as phospholipase and acyltransferase, play crucial roles in these metabolic pathways. The synthesis of phospholipids occurs mainly in the endoplasmic reticulum, where fatty acids are combined with glycerol and phosphate. Phospholipids can be modified or degraded to release fatty acids and other signaling molecules, impacting various cellular functions, including cell signaling and membrane repair.