1. WARM UP 1.Describe how connective tissue is used in the skeletal system. 2.List as many things as you can that your skeletal system does for you.

2. Skeletal System

3. Levels of Organization Organ System (Skeletal) – Organ (Bone) Tissue (Connective)

4. Skeletal System Divisions Axial – Skull, vertebrae, ribcage Appendicular – Hips, shoulders, appendages

5. Functions Movement – Muscle support Axial Appendicular

6. Functions Movement – Joints Cartilaginous – Compression – Vertebrae

7. Functions Movement – Joints Synovial – Ball-and-socket – Hinge

8. Functions Movement – Joints Synovial – Pivot – Saddle

9. Functions Protection – “Cages” around vital organs – Joints Fibrous – Short, tough fibers – Skull

10. Functions Mineral bank – Hardness from calcium Withdrawn and deposited as needed

11. Functions Withdrawn and deposited as needed – Use creates need for deposition – Lack of calcium means withdrawal

12. Functions Produce blood cells – Red marrow

13. General Bone Structure Epiphysis – Spongy bone – At ends Diaphysis – Compact bone – Main shaft

14. General Bone Structure Periosteum – Outer covering – Blood vessels Medullary cavity – Red marrow – Yellow marrow (fat)

15. General Bone Structure Columns of osteons – Bone around canals with blood vessels – Made by osteocytes in rings

16. WRAP UP Compare and contrast compact and spongy bone. Compare and contrast cartilaginous joints and synovial joints.