UK GCSE level age ~14-16, ~US grades 9-10 Biology revision notes re-edit 23/05/2023 [SEARCH]
Skeleton and muscles: 1. Bones and function of the human skeleton system Doc Brown's Biology exam study revision notes * There are various sections to work through, after 1 they can be read and studied in any order. INDEX of biology notes on the skeleton and muscles *
In the diagram details of the bones of the hands and the feet are not shown.
Bones are made of tough calcium based materials and softer tissue.
The out layers of bone is made from strong and had tissues based on calcium compound molecules.
This makes bones strong and rigid - they don't bend easily.
The inner layers of bone are made from more softer spongy tissue, but still a fairly strong material.
The skeletal system as a whole has four main functions. 1. Protection
2. Support
3. Movement
4. Production of blood cells
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