Biology, Answering the Big Questions of Life/CellWalls
What is a cell wall
[edit | edit source]A cell wall is a firm structure on the outside of a cell membrane that helps maintain osmotic pressure in a cell by making a limit that prevents the cell from expanding and bursting due to osmosis.
The cell wall also adds structure to multicellular organisms.
It must have openings to allow nutrients to pass freely into and out of the cell.
Cell Wall Materials
[edit | edit source]Cell walls are made of different materials in different kingdoms of organisms.
- Archea
- Bacteria - Peptidoglycan
- Fungi - Chitin
- Plantae - Cellulose, Lignin,