Saturday, January 30, 2010
Have you ever thought about why we need a skeleton? Just think about the meat you see in butcher’s shop.It is soft,like our own muscle.The other organs in our body are just as soft.Without a skeleton, we would slump into an untidy rubbery heap.Our muscle are strong, but without a skeleton they have nothing to pull against and we would be unable to stand up or to move.
Some organs need more protection than others.For example,the brain and spinal cord are protected by the skull and the spine.The hearts,lungs,liver and intestines are all easily damaged, so they are protected by ribs,hip bones and spine.
The whole system of skeleton and muscles is strong but flexible.It protects the most important organs, and allows us to move freely.
There are 206 separate bones in an adult’s body.As basics we start off with about 300 bones,but some join together as we grow. We have many more muscles than bones abut 656 separate muscles, making up a third of the total weight of a woman and nearly half the weight of a woman and nearly half the weight of a man.
( Source Window on the world )
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