Table of contents

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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

Veins

Anatomy & Physiology

19. The Blood Vessels

Veins

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Multiple Choice

Which of the following statements is true about veins?

Veins are primarily responsible for oxygenating blood.

Veins carry blood away from the heart.

Veins contain valves to prevent backflow of blood.

Veins have thicker walls than arteries.

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Verified step by step guidance

Begin by understanding the primary function of veins in the circulatory system. Veins are responsible for returning deoxygenated blood back to the heart, not oxygenating blood.

Next, consider the direction of blood flow in veins. Veins carry blood towards the heart, contrasting with arteries, which carry blood away from the heart.

Examine the structural features of veins. Veins contain valves that prevent the backflow of blood, ensuring it moves in the correct direction towards the heart.

Compare the wall thickness of veins and arteries. Arteries have thicker walls than veins due to the higher pressure of blood they carry from the heart.

Conclude by identifying the true statement: Veins contain valves to prevent backflow of blood, which is a key feature distinguishing them from arteries.