Bones are living, growing tissues. What are they made of and how do they develop from young to old?
- Bones support the body and protect vital organs.
- When you are born you have around 300 bones, which fuse to form the adult skeleton made up of 200 bones.
- Bones contain blood vessels, nerve cells and living bone cells called osteocytes.
- The outer, hard framework of bones is made of phosphorus and calcium.
Without your skeleton your body would be like jelly.
Your bones support your body and protect your vital organs.
Rib cage protects heart and lungs
When you were born, you had around 300 bones.
Babies have 300 bones
But as you grow up, some of your bones fuse together, so by the time ...
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