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 is a distinguishing feature of lymphatic capillaries compared to blood capillaries?

Lymphatic capillaries have thicker walls than blood capillaries

Lymphatic capillaries contain red blood cells

Lymphatic capillaries are lined with stratified squamous epithelium

Lymphatic capillaries have closed ends

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Verified step by step guidance

Understand the structure and function of lymphatic capillaries: Lymphatic capillaries are small, thin-walled vessels that are part of the lymphatic system. Their primary role is to collect excess interstitial fluid (lymph) and transport it back to the bloodstream.

Compare lymphatic capillaries to blood capillaries: Blood capillaries are part of the circulatory system and are responsible for the exchange of gases, nutrients, and waste products between blood and tissues. Lymphatic capillaries, on the other hand, are specialized for absorbing interstitial fluid and larger molecules like proteins.

Identify the structural differences: Lymphatic capillaries have unique features, such as overlapping endothelial cells that act as one-way valves, allowing fluid to enter but preventing it from flowing back out. They also have closed ends, unlike blood capillaries, which form continuous networks.

Eliminate incorrect options: Lymphatic capillaries do not have thicker walls than blood capillaries; in fact, their walls are thinner. They do not contain red blood cells, as these are confined to the circulatory system. Additionally, lymphatic capillaries are lined with simple squamous epithelium, not stratified squamous epithelium.

Conclude with the correct distinguishing feature: The closed ends of lymphatic capillaries are a key feature that differentiates them from blood capillaries, as this structure allows them to effectively collect lymph from the surrounding tissues.