The cell wall is the outer most covering of the cell. The cell wall covers the cell membrane. The cell membrane is also known as the plasma membrane or plasma lemma. There is no other name for the cell wall. The cell membrane is present in almost all types of cells. The cell wall is present in bacteria, fungi, algae and plant cell. It is absent in an animal cell and protozoa. The cell membrane is a biological membrane, which is semi- permeable. It allows the passage of certain substances through them.