1. Bell Ringer: 1.What keeps tibia from shifting posteriorly? 2.What provides stability and cushion? 3.What prevents lateral knee collapse? 4.What connects bone to bone? 5.What connects muscle to bone? PCL Meniscus LCL Tendons Ligaments Turn in homework assignment from last time to me…

2. Bone Types, Layers, and Sections https://www.youtube.com/watch?feature=player_embedded&v=inqWoakkiTc

3. Joke of the Day: http://www.funnyordie.com/videos/18da80c0 6b/man-dressed-as-a-scarecrow-gets- punched-from-that-happened

4. Bone types 1.Long bone – Femur (longest in body!)

5. Bone types 1.Long bone – Femur 2.Flat bone - Sternum

6. Bone types 1.Long bone – Femur 2.Flat bone – Sternum 3.Irregular bone - Pelvis

7. Bone types 1.Long bone – Femur 2.Flat bone – Sternum 3.Irregular bone – Pelvis 4.Short bone - Talus

8. Bone layers 1.Periosteum - “around the bone” thin, transparent place for muscle attachment

9. Bone layers 1.Periosteum - 2.Compact - white, dense, full of canals osteocytes (bone cells) found here.

10. Bone layers 1.Periosteum - 2.Compact - 3.Spongy bone - honeycomb shape, flexible strongest layer

11. Bone layers 1.Periosteum - 2.Compact - 3.Spongy bone - 4.Marrow - found in large bones red = RBC’s yellow = WBC’s

12. Bone sections (Label) 1.Proximal epiphysis Proximal Epiphysis

13. Bone sections (Label) 1.Proximal epiphysis 2.Diaphysis Diaphysis

14. Bone sections (Label) 1.Proximal epiphysis 2.Diaphysis 3.Distal epiphysis Distal Epiphysis

15. Chemical Composition of Bone Bone Matrix: – Organic Parts: Collagen (proteins) Growth Factor (vitamins and hormones) – Inorganic Parts: Bone minerals “ground substance” (calcium and salts)