Cellulosic, made primarily of cellulose. Semi-rigid, permeable to all substances. Membranes Several types of membranes in cell. Called channels, pores, gates, transporters 2. 100's of components 5.
Water passes through cell wall, through passageways in PM and tonoplast into vacuole.
Garbage dump materials no longer needed by the cell 3. Detoxification center toxins can be dumped into vacuole and won't kill the cell. Each of these have a double membrane called an envelope. Mitochondria and plastids have internal membranes the purpose of these is to keep biochemistry reactions inside the organelle separate. Cellulosic cell wall 2.