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

19. The Blood Vessels

Capillaries

Anatomy & Physiology

19. The Blood Vessels

Capillaries

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Multiple Choice

Which of the following is a primary function of capillaries?

Facilitating the exchange of nutrients and waste between blood and tissues

Transporting oxygen-rich blood from the heart to the body

Pumping blood throughout the circulatory system

Storing blood for emergency use

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Verified step by step guidance

Understand the role of capillaries in the circulatory system. Capillaries are the smallest blood vessels in the body and form a network between the arterioles and venules.

Recognize that capillaries have thin walls, which are only one cell thick. This structure is crucial for their primary function.

Identify the primary function of capillaries: facilitating the exchange of nutrients, gases, and waste products between the blood and surrounding tissues.

Differentiate the function of capillaries from other blood vessels: Arteries transport oxygen-rich blood from the heart to the body, while veins carry blood back to the heart.

Conclude that the primary function of capillaries is not to transport blood or store it, but to enable the exchange of substances between blood and tissues, which is essential for maintaining homeostasis.