1. PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PART B 5 The Skeletal System

2. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Bone Fractures  Fracture—break in a bone  Types of bone fractures  Closed (simple) fracture—break that does not penetrate the skin  Open (compound) fracture—broken bone penetrates through the skin  Bone fractures are treated by reduction and immobilization

3. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Common Types of Fractures Table 5.2

4. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Repair of Bone Fractures  Hematoma (blood-filled swelling) is formed  Break is splinted by fibrocartilage to form a callus  Fibrocartilage callus is replaced by a bony callus  Bony callus is remodeled to form a permanent patch

5. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stages in the Healing of a Bone Fracture Figure 5.5 Hematoma External callus Bony callus of spongy bone Healed fracture New blood vessels Internal callus (fibrous tissue and cartilage) Spongy bone trabecula Hematoma formation Fibrocartilage callus formation Bony callus formation Bone remodeling

6. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stages in the Healing of a Bone Fracture Figure 5.5, step 1 Hematoma Hematoma formation

7. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stages in the Healing of a Bone Fracture Figure 5.5, step 2 Hematoma External callus New blood vessels Internal callus (fibrous tissue and cartilage) Spongy bone trabecula Hematoma formation Fibrocartilage callus formation

8. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stages in the Healing of a Bone Fracture Figure 5.5, step 3 Hematoma External callus Bony callus of spongy bone New blood vessels Internal callus (fibrous tissue and cartilage) Spongy bone trabecula Hematoma formation Fibrocartilage callus formation Bony callus formation

9. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Stages in the Healing of a Bone Fracture Figure 5.5, step 4 Hematoma External callus Bony callus of spongy bone Healed fracture New blood vessels Internal callus (fibrous tissue and cartilage) Spongy bone trabecula Hematoma formation Fibrocartilage callus formation Bony callus formation Bone remodeling

10. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton  Forms the longitudinal axis of the body  Divided into three parts  Skull  Vertebral column  Bony thorax

11. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Figure 5.6a

12. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Axial Skeleton Figure 5.6b

13. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Skull  Two sets of bones  Cranium  Facial bones  Bones are joined by sutures  Only the mandible is attached by a freely movable joint

14. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Lateral View Figure 5.7

15. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Superior View Figure 5.8

16. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Inferior View Figure 5.9

17. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Human Skull, Anterior View Figure 5.11

18. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses  Hollow portions of bones surrounding the nasal cavity  Functions of paranasal sinuses  Lighten the skull  Give resonance and amplification to voice

19. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Figure 5.10a

20. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Paranasal Sinuses Figure 5.10b

21. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Hyoid Bone  The only bone that does not articulate with another bone  Serves as a moveable base for the tongue  Aids in swallowing and speech

22. Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings The Hyoid Bone Figure 5.12