1. What you will learn today... The skeleton supports, protects, stores, allows movement, and produces blood The axial skeleton consists of the skull, vertebral column, and ribs The appendicular skeleton includes the pectoral girdle and pelvic girdle Bone can be compact or spongy and starts out as cartilage Hyaline cartilage is found on the ends of bones at the joints

2. The Skeletal System

3. The Skeleton A.Functions 1. Supports the body 2. Protects soft body parts 3. Storage areas for calcium and phosphorus 4. Attaches muscle 5. Produces red blood cells 6. Permit body movement

4. The Skeleton B.Axial Skeleton

5. Axial Skeleton 1.Skull a. Sinuses: air spaces b. Cranium: 8 fused bones that holds the brain c. Facial bones: protect sense organs and makes up jaws

6. Axial Skeleton 2. Vertebral Column a. Forms backbone b. Made up of vertebrae c. Between vertebrae are disks

7. Axial Skeleton 3. Ribs a. Twelve pairs *10 pairs connect to the sternum *2 pairs are called floating ribs b. All ribs connect to vertebrae

8. The Skeleton C. The Appendicular Skeleton

9. Appendicular Skeleton 1. Pectoral girdle a. Clavicle b. Scapula c. Arms (Humerus, Ulna, Radius, Carpals)

10. Appendicular Skeleton 2. Pelvic girdle a. 2 Hipbones b. Sacrum c. Legs (Femur, Tibia, Fibula, Tarsals)

11. Bone Structure A. Compact bone 1. Haversian Canal 2. Osteocytes in Lacunae

12. Bone Structure B. Spongy bone 1. Filled with red marrow 2. Typical bone... Femur

13. Bone Development A. Bone starts out as cartilage B. The process of cartilage becoming bone is called ossification

14. Joints: linkage of bones A. Immoveable (fused bones) B. Slightly moveable (vertebrae) C. Freely moveable (Synovial joints)