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Without your bones, you would be a pile of skin,
muscle and fat. |
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Your bones let you stand up and support yourself. But
what are |
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your bones and how do they work? |
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The skeletal system consists of all the bones in your
body. Bones |
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protect delicare organs in your body. Bones enable
you to stand |
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up. Muscles, which are attached to the bones allow us
to move |
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our bones. |
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The adult skeletal system consists of 206 bones. The
largest |
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bone is your thigh bone (the femur) and the smallest
bones |
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are those in the middle ear. Your skull has 29 bones.
Your |
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spine has 26 bones called vertevrae. Your ribs and
breast |
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bone (sternum) have a total of 25. Your shoulders,
arms, |
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and hands have 64 bones total. Your pelvis, legs, and
feet |
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have 62 bones total. |
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Bone Marrow |
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Bones serve as storage places for minerals such as
calcium |
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and phosphorus. The bone marrow of certain bones make |
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red and white blood cells. |
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Because bones contain living tissue they need a
constant. |
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supply of nutrients and oxygen. They get these from
blood |
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vessels which are supplied to your bones. Bones also |
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contain nerves |
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Joints |
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A joint is where two bones meet. The joint is where
the |
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two bones can bend. Ligaments and muscles hold two |
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bones together. |
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There are three types of joints: pivot joint, hinge
joint |
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and ball and socket joint. A joint is surrounded by a |
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special fluid to prevent two bones from rubbing
against |
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each other and causing injury to the bones. If a
joint is |
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forced beyond its limits it will tear and cause a
sprain. |
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If the joint is pulled out of its normal position it
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dislocated. |
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