The cellulose is a polysaccharide made of many glucose units linked together. Just inside of the cell wall is the cell membrane. This part of my body gives an extra layer of protection and keeps things in and out of me. The cell membrane is mostly made out of lipids. The cell membrane is also permiable to water.
Water can slip in and out of the cell easily through the cell membrane.
This process is called osmosis. Within the cell membrane is my nucleus. The nucleus acts as a brain to me. It contains DNA and RNA which operate together to build and control the cell. The nucleus is a small tiny cell within me.