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

Secondary Lymphoid Organs: Lymph Nodes

Anatomy & Physiology

20. The Lymphatic System

Secondary Lymphoid Organs: Lymph Nodes

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Multiple Choice

What happens to lymph as it passes through a lymph node?

It is absorbed into surrounding tissues.

It is converted into blood plasma.

It is filtered to remove bacteria and debris.

It is stored for future use.

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Verified step by step guidance

Understand the function of lymph nodes: Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They play a crucial role in the body's immune response by filtering lymph fluid.

Identify the components of lymph: Lymph is a clear fluid that circulates through the lymphatic system, containing white blood cells, especially lymphocytes, which are crucial for immune responses.

Recognize the filtering process: As lymph passes through a lymph node, it is filtered to remove bacteria, viruses, and other debris. This process helps to cleanse the lymph before it is returned to the bloodstream.

Consider the role of immune cells: Within the lymph nodes, immune cells such as macrophages and lymphocytes identify and destroy pathogens and foreign particles present in the lymph.

Conclude the process: After filtration, the cleansed lymph exits the lymph node and continues its journey through the lymphatic system, eventually returning to the circulatory system.