The cell wall (also referred to as the cell wall (PM) or cytoplasmic membrane, and historically mentioned because the plasmalemma) may be a biological membrane that separates the inside of all cells from the surface environment (the extracellular space) which protects the cell from its environment. The cell wall consists of a lipid bilayer, including cholesterols (a lipid component) that sit between phospholipids to take care of their fluidity at various temperatures. The membrane also contains membrane proteins, including integral proteins that pass the membrane serving as membrane transporters, and peripheral proteins that loosely attach to the outer (peripheral) side of the cell wall, acting as enzymes shaping the cell. The cell wall controls the movement of drugs in and out of cells and organelles. during this way, it's selectively permeable to ions and organic molecules. Additionally, cell membranes are involved during a sort of cellular processes like cell adhesion, ion conductivity and cell signalling and function the attachment surface for several extracellular structures, including the cell membrane, the carbohydrate layer called the glycocalyx, and therefore the intracellular network of protein fibers called the cytoskeleton. Within the field of synthetic biology, cell membranes are often artificially reassembled.