Table of contents

Skip topic navigation

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

Overview of Lymphoid Organs

Anatomy & Physiology

20. The Lymphatic System

Overview of Lymphoid Organs

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

A patient comes to you after experiencing multiple infections in a short period of time. Analysis reveals that she has a very low white blood cell count. Which lymphoid organ is likely not functioning correctly?

Lymphatic capillaries.

Tonsils.

Red Bone Marrow.

Thoracic Duct.

Previous problemNext problem

Verified step by step guidance

Understand the role of white blood cells (WBCs) in the immune system: WBCs are crucial for fighting infections and are produced in the bone marrow.

Identify the function of the red bone marrow: It is the primary site for the production of blood cells, including white blood cells, through a process called hematopoiesis.

Consider the symptoms: A low white blood cell count suggests a problem with the production of these cells, which points to an issue with the red bone marrow.

Evaluate the other lymphoid organs: Lymphatic capillaries, tonsils, and the thoracic duct are involved in the immune response but do not produce white blood cells.

Conclude that the red bone marrow is likely not functioning correctly, leading to the patient's low white blood cell count and increased susceptibility to infections.