Table of contents

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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

Primary Lymphoid Organs

Anatomy & Physiology

20. The Lymphatic System

Primary Lymphoid Organs

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Multiple Choice

Why is it important for there to be a blood-thymus barrier?

To prevent maturing T cells from encountering antigens, as it could disrupt their development.

To prevent mature T cells from leaving the thymus.

To prevent immature T cells from the red bone marrow from entering the thymus.

To prevent thymic corpuscles from being exposed to too much oxygen.

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Verified step by step guidance

Understand the role of the thymus: The thymus is an organ where T cells mature. It is crucial for the development of a functional and self-tolerant T cell repertoire.

Identify the function of the blood-thymus barrier: The blood-thymus barrier is a physical barrier that separates developing T cells in the thymus from the bloodstream.

Consider the importance of antigen exposure: Maturing T cells should not be exposed to antigens prematurely, as this could lead to improper development or autoimmunity.

Recognize the correct function of the blood-thymus barrier: The primary purpose of the blood-thymus barrier is to prevent maturing T cells from encountering antigens, ensuring proper development.

Evaluate the options: The correct answer is the one that aligns with the function of the blood-thymus barrier, which is to prevent maturing T cells from encountering antigens.