1. SKELETAL SYSTEM Cartilage and joints

2. cartilage Connective tissue found in joints Specialized cells called chondrocytes Three types of cartilage –Elastic –Hyaline –Fibrocartilage Does not contain blood vessels Functions like a rubber cushion at ends of joints

3. elastic Cartilage More flexible than hyaline cartilage Provides the framework for the outer ears and also parts of the larynx

4. elastic Cartilage at the cellular level

5. hyaline Cartilage Most common type of cartilage Looks like “milk glass” Occurs on the ends of many joints, in the soft part of the nose, in supporting rings of respiratory passages Form most embryonic skeletal parts, which are later replaced by bone

6. Hyaline Cartilage at the cellular level

7. fibrocartilage “shock absorber” for structures that are subjected to pressure such as between the bones of the spine and between the bones of the pelvis

8. fibroCartilage at the cellular level

9. Compare cartilage cells to bone cells elasti c hyaline fibrocarti lage

10. Joint Types Synarthroses – immovable (such as cranial bones) Amphiarthroses – slightly moveable (such as synthesis pubis) Diathroses – freely moveable

11. Diathroses Joints 1 Ball-and-Socket- Joint 2 Condyloid Joint 3 Saddle Joint 4 Hinge Joint 5 Pivot Joint 6 (not pictured) gliding joint

12. Diathroses Joints Ball and Socket – shoulder, hip

13. Diathroses Joints Condyloid – wrist, ankle

14. Diathroses Joints Saddle – thumb

15. Diathroses Joints Hinge – elbow, knee, fingers, toes

16. Diathroses Joints Pivot – forearm, neck

17. Diathroses Joints Gliding - vertebrae