1. Microscopic Structure of Compact Bone

2. The Osteon Compact bone is made of multiple osteons
Osteons are made of concentric rings of matrix called lamellae.

3. Osteocytes
Osteocytes(bone cells) live in spaces within the lamellae. These spaces are called lacunae.

4. The Matrix
Calcium Carbonate and Calcium Phosphate form mineral crystals called hydoxyapatite.

5. Blood Flow to the Osteocytes
Blood enters to the bone by arterioles through the nutrient foramina.
Blood also enters the bone through periosteal blood vessels.
Blood then travels through the Haversian canals. These run through the center of the osteon.
Haversian canals are connected laterally through Volkman’s canals.
The smallest canals connecting all osteocytes are called canaliculi.

6. Blood Flow to the Osteocytes

7. Review
What is the functional unit of compact bone called?

8. Review
What is the functional unit of compact bone called?
The Osteon

9. Review
2. “Bone cells” live within the “spaces” found between the “rings” of the osteon What are these three structures called?

10. Review
2. “Bone cells” live within the “spaces” found between the “rings” of the osteon What are these three structures called? Bone Cells=Osteocytes Spaces =lacunae Rings= lamellae

11. Review
Place the following blood vessels or canals in order from largest to smallest
Volkman’s canals
Canaliculi
Haversian Canals

12. Review
Place the following blood vessels or canals in order from largest to smallest
Haversian Canals
Volkman’s Canals
Canaliculi