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

1. Introduction to Anatomy & Physiology

Introduction to Directional Terms

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Directional Terms

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Multiple Choice

The thoracic and sacral curvatures of the vertebral column are classified as which type of curvature?

Tertiary curvatures

Compensatory curvatures

Primary curvatures

Secondary curvatures

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Verified step by step guidance

Understand the classification of vertebral column curvatures: The vertebral column has four curvatures—cervical, thoracic, lumbar, and sacral. These curvatures are categorized as either primary or secondary based on their development and function.

Define primary curvatures: Primary curvatures are those present at birth and are concave anteriorly. They include the thoracic and sacral curvatures, which are designed to accommodate the organs in the thoracic and pelvic cavities.

Define secondary curvatures: Secondary curvatures develop postnatally and are convex anteriorly. These include the cervical curvature (develops as the infant begins to lift their head) and the lumbar curvature (develops as the child begins to walk).

Compare the thoracic and sacral curvatures to the definitions: Since the thoracic and sacral curvatures are present at birth and are concave anteriorly, they fit the definition of primary curvatures.

Conclude that the thoracic and sacral curvatures are classified as primary curvatures based on their developmental origin and anatomical characteristics.