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

3. Energy & Cell Processes

Introduction to Cell Division

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to Cell Division

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Multiple Choice

What are the thin layers of cartilage cells that enable the diaphysis to grow in length during bone development?

Medullary cavity

Epiphyseal plates

Periosteum

Articular cartilage

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Verified step by step guidance

Understand the context of the question: The diaphysis is the shaft of a long bone, and its growth in length during development is facilitated by specific structures within the bone anatomy.

Identify the role of the epiphyseal plates: These are thin layers of hyaline cartilage located at the ends of the diaphysis, near the epiphyses. They are responsible for longitudinal bone growth during childhood and adolescence through endochondral ossification.

Clarify why the other options are incorrect: The medullary cavity is the hollow space within the diaphysis that contains bone marrow, and it does not contribute to length growth. The periosteum is a fibrous membrane covering the outer surface of the bone, involved in width growth and repair, not length. Articular cartilage covers the ends of bones at joints to reduce friction, but it does not contribute to diaphysis length growth.

Explain the process of endochondral ossification: In the epiphyseal plates, cartilage cells (chondrocytes) divide and are replaced by bone tissue, allowing the diaphysis to elongate. This process continues until the plates close during late adolescence.

Conclude with the importance of epiphyseal plates: These structures are critical for proper bone development and growth, and their closure marks the end of longitudinal bone growth.