Phospholipids are a combination of amphiphilic molecules, hydrophilic moieties, and hydrophobic fatty acid chains. They are present in all living organisms as long as their cells are surrounded by cell membranes. Phospholipids are present in cell membranes because they are the major materials in cell membranes.
They are majorly derived from fatty acids. When you check their structure, a section of their body has two hydrophobic tails and a hydrophilic head. The hydrophilic part of the head is the reason why they can absorb water when they are dispersed in water to give a shape that looks like a lamellar.
The hydrophilic end of phospholipids also contains a phosphate group. This also explains why they are often used as emulsifiers. Due to their amphiphilic characteristic, they can easily form lipid bilayers. Invariably, the part of the cell that contains phospholipids is the cell membrane. Due to their nature, they act as pathways between the cell membrane.