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

20. The Lymphatic System

Introduction to the Lymphatic System

Anatomy & Physiology

20. The Lymphatic System

Introduction to the Lymphatic System

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Multiple Choice

Which of the following distinguishes lymphatic vessels from veins?

Lymphatic vessels have thinner walls and more valves than veins.

Lymphatic vessels carry oxygenated blood, unlike veins.

Lymphatic vessels are directly connected to the heart, unlike veins.

Lymphatic vessels have a thicker tunica media compared to veins.

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Verified step by step guidance

Understand the structure and function of lymphatic vessels: Lymphatic vessels are part of the lymphatic system, which is responsible for returning excess tissue fluid to the bloodstream, transporting dietary lipids, and facilitating immune responses.

Compare the wall structure of lymphatic vessels and veins: Lymphatic vessels have thinner walls compared to veins. This is because they are under lower pressure and need to be more flexible to accommodate varying volumes of lymph.

Examine the presence of valves: Lymphatic vessels have more valves than veins. These valves are crucial for preventing the backflow of lymph, ensuring it moves in one direction towards the heart.

Clarify the misconception about blood transport: Lymphatic vessels do not carry blood, whether oxygenated or deoxygenated. They transport lymph, a fluid containing white blood cells, proteins, and fats.

Address the connection to the heart and tunica media thickness: Lymphatic vessels are not directly connected to the heart, and they have a thinner tunica media compared to veins, which have a thicker tunica media to withstand higher blood pressure.