1. The Skeletal System http://www.youtube.com/watch?v=vya4wpS2f gkwww.youtube.com/watch?v=vya4wpS2f gk

2. Introduction  The skeletal system is not just made up of bones.  It is made up of bones, cartilages, joints, ligaments, and other connective tissues.  The skeletal system has 5 primary functions………

3. 5 Functions 1.Support 2.Storage 3.Blood Cell Production 4.Protection 5.Leverage

4. Th Support  The skeletal system provides structural support for the entire body.  Individual bones, or groups of bones provide a framework for the attachment of soft tissues and organs.

5. Support  Your bones are as strong as CONCRETE, but lighter.  That is why your bones can support the weight of your body.  Without the skeleton to pull against, muscles would not be able to make us sit, stand, run, or even walk.

6. Storage  Bones are a storage center for calcium salts.  Calcium salts maintain normal concentrations of calcium and phosphate ions in body fluids.

7. Storage  Calcium ions have a lot to do with the CLOTTING PROCESS.  Bones also store lipids in yellow marrow.

8. Th Blood Cell Produciton  Red blood cells, white blood cells, and other blood elements are produced in the RED MARROW of the bone.  Red marrow fills the internal cavities of many bones.

9. Protection  Soft tissues and organs are usually surrounded by bones or skeletal elements.  Ribs protect the heart andlungs  Skull encloses the brain  Vertebrae shield the spinal cord  Pelvis protect important digestive and reproductive organs.

10. Leverage  The bones act as levers  These levers can change magnitude and direction of the forces generated by skeletal muscles.  The resulting movements can be as simple as the motion of a fingertip to doing a backflip.