Population Statistics within the Arizona Department of Administration and does not necessarily reflect the official position of the U.S. Department of Labor. The Department of Labor makes no guarantees, warranties,
The Cell Membrane. The Structure of the Cell Membrane. The cell membrane (or plasma membrane) surrounds all living cells, and is the cell's most important organelle. It controls how substances can move in and out of the cell and is responsible for many other properties of the cell as well.
In these organisms, the cells become specialised, and one or more of these different functions may be lost. Parts of the Human Cell The various parts of the human cell and their functions are: Cell Membrane This is the outer layer of the cell. It gives the cell its shape and holds the liquid inside the cell. This membrane is a semi-permeable membrane which means it allows certain things to pass in and out of the cell.