lipid bilayer or phospholipid bilayer.

amphipathic bilayer biological biology cell cellular channel cytomembrane cytoplasm education fats fatty heads health human hydrophilic hydrophobic integral intracellular life lipid lipids lipoprotein liposome macro medical medicine membrane metabolism microscopic molecular molecules osmosis phospholipid phospholipids plasmalemma polar protection protects protein protoplasm red rendering science structural structure system tails transport