Reference Terms
from Wikipedia, the free encyclopedia

Cell wall

A cell wall is a fairly rigid layer surrounding a cell located outside of the plasma membrane that provides additional support and protection.

They are found in bacteria, archaea, fungi, plants, and algae.

Animals and most other protists have cell membranes without surrounding cell walls.

Note:   The above text is excerpted from the Wikipedia article "Cell wall", which has been released under the GNU Free Documentation License.
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