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

20. The Lymphatic System

Secondary Lymphoid Organs: Lymph Nodes

Anatomy & Physiology

20. The Lymphatic System

Secondary Lympoid Organs: Lymph Nodes

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Multiple Choice

Which statement is true of lymph nodes?

There is a dense collection located in the feet and hands.

They contain red pulp.

They have fewer efferent vessels than afferent vessels.

They lack a capsule.

There are over 10,000 located throughout the body.

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Verified step by step guidance

Understand the structure and function of lymph nodes: Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They filter lymph fluid and contain immune cells that help fight infection.

Identify the key features of lymph nodes: Lymph nodes have a capsule, which is a fibrous covering that encloses the node. They contain both afferent vessels, which bring lymph fluid into the node, and efferent vessels, which carry filtered lymph fluid away.

Compare the number of afferent and efferent vessels: Lymph nodes typically have more afferent vessels than efferent vessels. This design allows lymph fluid to enter the node from multiple points and exit through fewer channels, ensuring thorough filtration.

Clarify the location and number of lymph nodes: Lymph nodes are distributed throughout the body, but there is no dense collection specifically in the feet and hands. The total number of lymph nodes in the human body is generally around 600, not 10,000.

Differentiate between lymph nodes and other lymphatic structures: Lymph nodes contain white pulp, not red pulp. Red pulp is found in the spleen, another organ of the lymphatic system, which is involved in filtering blood rather than lymph.