Plasma membrane and cell wall are not the same thing. Plasma membrane,
also called cell membrane, is the outer membrane common to all living
cells and it is made of a phospholipid bilayer, embedded proteins and
some appendedcarbohydrates.
Because cell membranes are fragile, in some types of cells there are
even outer structures that support and protect the membrane, like the
cellulose wall of plant cells and the chitin wall of some fungi cells.
Most bacteria also present an outer cell wall made of peptidoglycans and
other organic substances.
