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Chapter 6, part 3

Chapter 6, part 3. Osseous Tissue and Skeletal Structure. SECTION 6-5 The Dynamic Nature of Bone. continually changing. Remodeling Exercise Hormone levels Growth hormone and thyroxine increase bone mass Calcitonin and PTH control blood calcium levels.

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Chapter 6, part 3

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  1. Chapter 6, part 3 Osseous Tissue and Skeletal Structure

  2. SECTION 6-5The Dynamic Nature of Bone

  3. continually changing • Remodeling • Exercise • Hormone levels • Growth hormone and thyroxine increase bone mass • Calcitonin and PTH control blood calcium levels

  4. Figure 6.12 A Chemical Analysis of Bone Figure 6.12

  5. The skeleton is a calcium reserve • 99% body’s calcium in the skeleton • Calcium ion concentration maintained by bones GI tract and kidneys • Calcitonin and PTH regulate blood calcium levels • Calcitonin decreases blood calcium levels • PTH increases blood calcium levels

  6. Figure 6.13 Factors that Alter the Concentration of Calcium Ions in Body Fluids Figure 6.13a

  7. Figure 6.13 Factors that Alter the Concentration of Calcium Ions in Body Fluids Figure 6.13b

  8. Fracture repair • Fracture hematoma • External callus • Internal callus

  9. Figure 6.14 Steps in the Repair of a Fracture Figure 6.14

  10. SECTION 6-6Bone Markings (Surface Features)

  11. Bone markings • Are characteristic for each bone and each individual • Markings include • Elevations • Projections • Depressions • Grooves and tunnels

  12. SECTION 6-7Aging and the Skeletal System

  13. Effects of aging include • Osteopenia • Osteoporosis

  14. Figure 6.16 The Effects of Osteoporosis Figure 6.16

  15. You should now be familiar with: • The functions of the skeletal system. • Bones and their major markings. • Cell types in bone and their functions. • Spongy and compact bone. • Intramembranous and endochondral ossification. • The effects of nutrition, hormones, exercise and aging on the bones. • The types of fractures.

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