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

Which event must occur first during endochondral ossification?

Invasion of the periosteal bud

Formation of the medullary cavity

Development of a cartilage model

Deposition of bone matrix by osteoblasts

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Verified step by step guidance

Understand the concept of endochondral ossification: This is the process by which bone tissue is formed from a cartilage model. It is the primary method of bone formation for long bones in the body.

Identify the sequence of events in endochondral ossification: The process begins with the development of a cartilage model, followed by other steps such as calcification, invasion of the periosteal bud, and deposition of bone matrix by osteoblasts.

Focus on the first event: The development of a cartilage model is essential because it provides the initial framework for bone formation. Without this model, subsequent steps cannot occur.

Relate the role of chondrocytes: Chondrocytes are responsible for producing the cartilage matrix during the initial stage of endochondral ossification. This matrix will later be replaced by bone tissue.

Recognize the importance of the cartilage model: The cartilage model serves as a scaffold for the deposition of bone matrix by osteoblasts, which occurs later in the process. This highlights why the development of the cartilage model must occur first.