Biology: Cells (BBC Bitesize)

Cell structure

Plants and animal cells share the same basic structural features, although plant cells have a few extra bits.

Here is a diagram of a typical animal cell:

Animal cells come in all kinds of shapes and sizes but have the same basic features.

The control centre is the nucleus; this contains all the genetic information for the cell and controls all its activities.

The cytoplasm is like a big soup of chemicals in which the reactions occur.

Then forming the outside of the cell is the cell membrane, which acts as a barrier and controls the transfer of materials into and out of the cell.

Note: Some animal cells do have a vacuole.

Here is a diagram of a typical plant cell:

Plant cells also come in a variety of forms but share similar features. In addition to the three basic features found in animal cells, plant cells have some useful extra ones.

Firstly they have a rigid cellwall made of fibres of cellulose (which we use

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