What does the cell wall protect the cell from?
The cell wall helps regulate water entering, acting as a pressure vessel so that the water doesn't harm the cell. In multi-cellular organs, it helps distinguish cell from cell and enables the cell to grow. It limits the entry of toxic molecules to the cell. Finally, it helps the cell retain water.
The function of the cell membrane is to protect the cell and it also regulates the movement of particles in and out of the cell. The cell wall can only be found in a plant cell. It's function is to protect the cell and provides support for a growing plant. The cell wall is a tough rigid structure that surrounds the cell membrane and gives the cell a regular, box-like shape.