1. WARM UP 1/24 1.List 5 functions of the skeletal system. 2.What are bone cells called? 3.What are the ends of long bone called? 4.What is the liquid in the center of bone called? 5.Where is the periosteum located? 6.What is the cavity in the center of the bone lined with?

2. Quiz - review your partner for a minute Remember you and your partner’s grade will be combined and averaged. EX: you: A- partner : C both will get: B

3. QUIZ – write the # right on top 1.Articular cartilage 2.spongy 3.compact 4.Medullary cavity 5.endosteum 6.marrow 7.periosteum 8.diaphysis 9.epiphysis 10. Articular cartilage 11. Medullary cavity 12. Diaphysis 13. Endosteum 14. Compact bone 15. Marrow 16. Epiphysis 17. Spongy bone 18. periosteum

4. NOTES CH 6 1/24 Bone composition

5. Bone tissue consists of: 1.Osteocytes – bone cells 2.Collagenous fibers – (strong yet a little flexible) 3.Calcified matrix - hardened due to calcium 4.Minerals and salts – (Ca, Na, Cl, Mg…) 5.Blood vessels 6.nerves

6. MICROSCOPIC STRUCTURE OF BONE 1.LACUNAE – tiny cavities containing osteocytes 2.LAMELLAE – circle of lacunae 3.OSTEOCYTES – bone cells

7. 1.HARVERSIAN CANALS – cavities that contain blood vessels and nerves (in center of lamellae) 2.CANALICULI – tiny cavities radiating from the Harversian canals to bring nutrients to the bone cells

14. LABELING 1.Harversian Canal 2.Lamellea 3.Lacunae 4.Periosteum 5.Blood vessels/nerves 6.Spongy bone 7.Lacunae 8.Osteocyte 9.Compact bone 10.Canaliculi 11.Lamellae Staple this together with your partner’s – if partner not here, write their name on the back of your paper.

15. GRADING - combined total 36 – 32 = A 31 – 29 = B 28 – 25 = C 24- 22 = D 21 or less = E