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

Lymphatic sinuses in the cortex and medulla of the lymph node primarily function to:

Secrete digestive enzymes

Store calcium for bone metabolism

Produce red blood cells

Filter lymph and facilitate the removal of foreign particles

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Verified step by step guidance

Understand the structure of a lymph node: Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They contain two main regions: the cortex (outer layer) and the medulla (inner layer). Both regions are involved in filtering lymph and immune responses.

Learn the role of lymphatic sinuses: Lymphatic sinuses are spaces within the lymph node that allow lymph to flow through. These sinuses are lined with macrophages and other immune cells that help trap and remove foreign particles, such as bacteria, viruses, and debris.

Clarify the function of the cortex: The cortex contains lymphatic sinuses and is rich in immune cells, including B cells and T cells. These cells play a role in identifying and responding to pathogens in the lymph.

Clarify the function of the medulla: The medulla also contains lymphatic sinuses and is primarily involved in filtering lymph. It houses macrophages and plasma cells that help remove foreign particles and produce antibodies.

Conclude the primary function: The lymphatic sinuses in both the cortex and medulla work together to filter lymph and facilitate the removal of foreign particles, ensuring the lymphatic system contributes to immune defense and maintaining fluid balance in the body.