Bones - page 1
Keywords: Skeletal Structure
By coco-pop on 18/08/2008
Level: GCSE Key Stage 3 (Years 7-9)
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Bones Of The Body
WHO
Every human has bones in their body. Some people have bigger bones and some people have smaller bones.
Many animals and fish have bones also.
WHAT
Bones are made of calcium and are important for the creatures who are designed to have them. If a human didn’t have any bones then they would just wobble about like a piece of jelly.
Bones help hold up the body structure and protect some of the vital and non-vital organs.
WHERE
Bones are everywhere in our body, in our head, shoulders knees and toes.
Animals that have bones are called vertebrates, animals without bones are called invertebrates.
There are 29 bones just in the human skull and about 206 in our whole body!
Worms are invertebrates, elephants are vertebrates.
WHEN
Your bones have been forming since you were a fetus only about eight weeks old. That is when the cartilage starts to grow inside you.
Also, when you die, the very last things to disintegrate are your bones. That is why when people see their long ago dead ancestors, they are all bones and nothing else.
HOW
Bones grow and repair themselves very easily, it just takes time. When your skeleton first starts growing and forming, it is built out of cartilage and then builds up in bone.
Calcium helps your bones grow stronger.
FACT: about 70% of bone is made of calcium salts!
WHY
Bones have many functions, holding up a body and protecting internal organs.
FACT: the spine protects the main nerve going FROM and TO your brain!
BYE
I hope you have learned a lot! ! !
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