Skeleton+Description

=Human Skeleton Description and Functions=

20% of your body weight is made up of your bones
====There are canals running through your bones that carry blood vessels. Inside your bones there is a soft tissue called bone marrow and there is 2 different kinds of bone marrow red and yellow. When you are young most of your bones contain red bone marrow. But when you are a teenager only the ends of your femurs, your hip bones, and your sternum or breastplate contain red bone marrow. Your other bones contain yellow bone marrow which stores fat that serves as an energy reserve.==== ====The 5 main functions of the skeletal system are it enables you to mauve around because without it the musles would have nothing to attach to so they couldn't pull on the bone to move your legs and arms.====