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

Gross Anatomy of Bone: Compact and Spongy Bone

Anatomy & Physiology

6. Bones & Skeletal Tissue

Gross Anatomy of Bone: Compact and Spongy Bone

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Multiple Choice

Which of the following is the primary structural unit of compact bone?

Trabeculae

Periosteum

Osteon (Haversian system)

Epiphyseal plate

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Verified step by step guidance

Understand the structure of compact bone: Compact bone is dense and forms the outer layer of bones. It is organized into repeating structural units called osteons, also known as Haversian systems.

Define the osteon: An osteon is the primary structural unit of compact bone. It consists of concentric rings of calcified matrix called lamellae, surrounding a central canal (Haversian canal) that contains blood vessels and nerves.

Differentiate the other options: Trabeculae are structural units of spongy bone, not compact bone. The periosteum is a connective tissue layer covering the outer surface of bones, and the epiphyseal plate is involved in bone growth, not structural organization.

Relate the osteon to its function: Osteons provide strength and support to compact bone by allowing it to resist compressive forces. The arrangement of lamellae and the presence of the central canal are key to this function.

Conclude that the correct answer is osteon (Haversian system), as it is the primary structural unit of compact bone, distinct from the other options provided.