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| All cells are made from a substance called protoplasm. |
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The main parts of a cell are:The nucleusThe cytoplasmThe plasma membrane |
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A cell is too small to see without a microscope.A cell is the smallest whole part of any living thing.A cell is alive.A cell can split in two, in order to grow. |
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An important function of cells, is to enable living things to repair themselves. They need to do this to replace old and worn out tissue. |
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Some animals, such as crabs and starfish can grow new limbs. |
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| Mammals can grow scar tissue over cuts. |
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| Broken bones can repair. |  |
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Plants can grow scar tissue over damaged areas. They may regenerate stems, leaves and flowers as long as their roots have not been destroyed. |
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