Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

4. Tissues & Histology

Specialized Connective Tissue: Bone

Anatomy & Physiology

4. Tissues & Histology

Specialized Connective Tissue: Bone

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Multiple Choice

Osteonecrosis is a condition where blood flow to bones is cut off resulting in tissue death. Which of the following would you expect to be most directly affected by the loss of blood flow?

The inorganic matrix.

Collagen fibers.

Osteocytes.

A-C are correct.

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Verified step by step guidance

Understand the role of blood flow in bone health: Blood flow is crucial for delivering nutrients and oxygen to bone cells, including osteocytes, which are responsible for maintaining bone tissue.

Identify the components of bone tissue: Bone tissue consists of an inorganic matrix (primarily calcium phosphate), collagen fibers, and osteocytes. Each component has a different role in bone structure and function.

Analyze the impact of blood flow loss: Osteocytes, being living cells, require a constant supply of nutrients and oxygen, which are delivered via blood flow. The inorganic matrix and collagen fibers are structural components and do not require direct blood supply for their maintenance.

Consider the consequences of osteonecrosis: When blood flow is cut off, osteocytes are most directly affected because they rely on blood for survival. Without blood flow, these cells can die, leading to tissue death and compromised bone integrity.

Conclude which component is most affected: Given the reliance of osteocytes on blood supply, they are the most directly affected by the loss of blood flow in osteonecrosis, compared to the inorganic matrix and collagen fibers.