Answer: The cell membrane is a biological membrane that separates the interior of all cells from the outside environment and protects the cell from its environment. The cell membrane consists of a lipid bilayer, made up of two layers of phospholipids with cholesterols interspersed between them, maintaining appropriate membrane fluidity at various temperatures. The membrane also contains membrane proteins, including integral proteins that span the membrane and serve as membrane transporters, and peripheral proteins that loosely attach to the outer side of the cell membrane, acting as enzymes to facilitate interaction with the cell's environment.
There are phospholipids. They have 2 tails one who is afraid of water and one that loves waters. The ones who love water stay on the outside. They tightly group together in order to keep water out. On top of the phospholipids are glycoproteins, they mark what is good and what is bad. They allow the nutrient to come in and the waste to keep out (other known as the cell marker). There is also cholesterol that keeps enough space between the tightly packed phospholipids so nutrients can actually get through!!! If possible please give Brainliest! Have a great day!!! (DO NOT STEAL THIS IS MY ORIGINAL IDEAS (to people who copy and paste))