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 Heart3h 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

6. Bones & Skeletal Tissue

Microscopic Anatomy of Bones - The Osteon

Anatomy & Physiology

6. Bones & Skeletal Tissue

Microscopic Anatomy of Bones - The Osteon

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Multiple Choice

Collagen fibers run in alternate directions between lamellae. What would the effect on bone be if all of the collagen fibers were oriented in the same direction?

The bone would lose its hardness and would bend easily.

The bone would break more easily if stress were applied from a different direction.

The structure of the osteon could not form; lamellae arise naturally from the alternating directions of collagen.

The periosteum could not attach properly as the perforating fibers rely on the alternating pattern of collagen.

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Verified step by step guidance

Understand the role of collagen fibers in bone structure: Collagen fibers provide tensile strength and flexibility to bones, allowing them to withstand various stresses.

Recognize the significance of alternating directions: In a healthy bone, collagen fibers run in alternate directions between lamellae, which helps distribute stress evenly across the bone.

Consider the impact of uniform direction: If all collagen fibers were oriented in the same direction, the bone would be less able to resist stress from multiple angles, making it more susceptible to fractures.

Analyze the structural implications: The alternating pattern of collagen fibers is crucial for the formation of osteons, the structural units of compact bone. Without this pattern, osteons could not form properly.

Evaluate the effect on periosteum attachment: The periosteum, a membrane that covers the bone, relies on perforating fibers that attach to the bone. These fibers depend on the alternating collagen pattern for proper attachment, which would be compromised if the fibers were aligned in the same direction.