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Bones, muscles, respiratory and circulatory systems.

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  • Essay length: 2660 words
  • Submitted: 27/03/2008
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AS and A Level Healthcare

The first 200 words of this essay...

Unit 12- Physical Activities

Skeletal system

The human body has 206 bones. They are divided in to two parts, the Axial skeleton and the Appendicular skeleton. The Axial is made up of the skull, sternum, ribs and spine. The Appendicular is made up of the shoulder, hip, arm, leg and pelvic bone. In the skeleton system there are 4 types of bones, 6 types of joints and 3 classes of levers.

There are four groups of bones they are long bones, short bones, flat bones and irregular bones.

* The long bones are found in the thigh, legs, arms and forearms. They are longer than wider. They have compact bone in the middle, so that they are stronger and do not bend, they have spongy bone at the end so they are more flexible to move.

* The short bones are usually found in the wrists and ankles. They are nearly as long as wide. They are mostly spongy, which gives them ability to move with a thin layer of compact bone.

* The flat bones are mostly in the cranium. They are thin, usually curved and flattened.

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