Cell Structure and Function
From OneSchoolWiki
[edit] Cells
All animals and plants are made up of cells. Most cells have:
- A nucleus – controlling the activity of the cell. All cells have these at one point.
- Cytoplasm – where chemical reactions occur. Inside the cytoplasm are enzymes which speed up these reactions. Cytoplasm also contains mitochondria which is where energy is released.
- A cell membrane – to control the passage of substances in and out of the cell.
Plants also have
- Cell walls – to strengthen the cell.
- Chloroplasts – to absorb sunlight energy to make food by photosynthesis.
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