1. Phospholipids: These are the most abundant component of the cell membrane. They form a phospholipid bilayer, which is a double layer of phospholipid molecules. Each phospholipid molecule has a hydrophilic (water-loving) head and two hydrophobic (water-fearing) tails. The hydrophilic heads face the watery environments inside and outside the cell, while the hydrophobic tails point towards each other in the center of the membrane.

2. Proteins: Proteins are embedded within the phospholipid bilayer, performing various functions:

* Integral membrane proteins: These proteins span the entire membrane and are involved in transport of molecules across the membrane, cell signaling, and cell-to-cell communication.

* Peripheral membrane proteins: These proteins are attached to the surface of the membrane and are involved in anchoring the membrane to the cytoskeleton, cell signaling, and enzymatic activity.

Other molecules:

* Cholesterol: This lipid molecule is interspersed within the phospholipid bilayer, helping to regulate membrane fluidity and stability.

* Glycolipids: These are lipids with attached carbohydrate chains, playing a role in cell recognition and adhesion.

The unique combination of these molecules gives the cell membrane its structural integrity, selective permeability, and ability to perform a wide range of functions crucial for cell survival.