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

Introduction to Blood Vessels

Anatomy & Physiology

19. The Blood Vessels

Introduction to Blood Vessels

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Multiple Choice

Which type of blood vessel carries blood back to the heart through a series of one-way valves?

Veins

Lymphatic vessels

Capillaries

Arteries

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Verified step by step guidance

Step 1: Begin by understanding the function of each type of blood vessel mentioned in the problem. Veins, lymphatic vessels, capillaries, and arteries all play distinct roles in the circulatory and lymphatic systems.

Step 2: Recall that veins are responsible for carrying blood back to the heart. They are equipped with one-way valves that prevent the backflow of blood, ensuring it moves in the correct direction toward the heart.

Step 3: Contrast veins with arteries, which carry blood away from the heart and do not have one-way valves. Arteries are designed to handle high-pressure blood flow from the heart.

Step 4: Consider lymphatic vessels, which are part of the lymphatic system rather than the circulatory system. While they also have one-way valves, their primary function is to transport lymph, not blood.

Step 5: Capillaries are small, thin-walled vessels where gas and nutrient exchange occurs. They do not have valves and are not involved in directly transporting blood back to the heart.