the thin structure made of a bilayer of lipids with embedded proteins that surrounds all cells is called the

The thin structure made of a bilayer of lipids with embedded proteins that surrounds all cells is called the cell membrane, also known as the plasma membrane. It is primarily composed of a lipid bilayer of phospholipids and proteins that regulate the passage of substances in and out of the cell, providing a protective barrier and enabling communication and transport functions for the cell.