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 Heart2h 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 regarding arteries and veins is true?

Arteries have less smooth muscle than veins.

Arteries always carry oxygenated blood, while veins always carry deoxygenated blood.

At any given time, there is more blood in the veins than in the arteries.

There tends to be a lower blood pressure in arteries than in veins.

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Verified step by step guidance

Begin by understanding the basic structure and function of arteries and veins. Arteries are blood vessels that carry blood away from the heart, while veins carry blood towards the heart.

Consider the composition of the vessel walls. Arteries have thicker walls with more smooth muscle and elastic fibers compared to veins, which have thinner walls and less smooth muscle.

Evaluate the blood pressure in these vessels. Arteries generally have higher blood pressure due to the force exerted by the heart during systole, whereas veins have lower blood pressure.

Analyze the blood volume distribution. At any given time, veins contain more blood than arteries due to their larger lumen and capacity to act as blood reservoirs.

Reflect on the oxygenation of blood. While it is commonly thought that arteries carry oxygenated blood and veins carry deoxygenated blood, this is not always true. For example, pulmonary arteries carry deoxygenated blood to the lungs, and pulmonary veins carry oxygenated blood back to the heart.