Osmosis video - Cell membrane

The cell membrane is an essential cellular structure consisting of a lipid bilayer with embedded proteins. The lipid bilayer is a double layer of phospholipids containing hydrophilic (water-loving) head groups and hydrophobic (water-hating) tails. The head groups interact with water, while the tails interact with each other to form the bilayer. The proteins in the membrane are embedded in the lipid bilayer and play various roles in cell function, including signal transduction, cell adhesion, and transport. The cell membrane regulates what comes in or out of the cell, known as selective permeability.