1. BONE TISSUE
BIOLOGY LAB
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

2. Types of bones
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

3. Characteristics of Bone
bone is a special form of connective tissue
consists of cells, fibers, and extracellular matrix.
Because of mineral deposition in the matrix, bones become calcified. produce hard structure for protecting various organs
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

4. Bone Matrix Highly vascularized to aid diffusion in calcified matrix•
Organic components of bone resist tension
whereas mineral components resist compression
Major component is coarse type I collagen fibers
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

5. Bone cells
Osteoprogenitor cells are located in the periosteum, endosteum,osteons, and perforating canals
Osteoblasts are on the bone surfaces and synthesize osteoid matrix
Osteocytes are mature osteoblasts, are branched, are located in lacunae, and use canaliculi for communication and exchange. maintain homeostasis of bone and blood concentrations of calcium and phosphate.
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

6. ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

7. Functions of bone can bear more weight than cartilage,
serve as a rigid skeleton for the body
provide attachment sites for muscles and organs.
Bone also protects the brain in the skull, heart and lungs in the thorax, and urinary and reproductive organs between the pelvic bones.
hemopoiesis (blood cell formation),
reservoirs for calcium, phosphate, and other minerals.
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

8. ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

9. Compact (cortical, Lamellar) ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

10. Cross section CC Osteons CC: Central Canal, Haversian canal 1/2/2018
ASSISTANT LECTURER FARAH E. ISMAEEL

11. longitudinal section
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

12. Spongy (Cancellous, woven) bone
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

13. Intramembranous ossification
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

14. Endochondral ossification
RPHCO
Reserve cartilage
Proliferation
Hypertrophy
Calcification
Ossification
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

15. Proliferation zone Hypertrophy zone Calcification zone
Ossification zone
Zone of ossification
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018

16. THANK YOU
ASSISTANT LECTURER FARAH E. ISMAEEL
1/2/2018