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

17. The Blood

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Multiple Choice

Which of the following is true regarding the blood-testis barrier?

It prevents the passage of antibodies into the seminiferous tubules.

It is formed by endothelial cells of the blood vessels.

It is responsible for the production of testosterone.

It allows free exchange of nutrients and waste products between blood and testicular tissue.

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Verified step by step guidance

Understand the function of the blood-testis barrier: The blood-testis barrier is crucial for protecting developing sperm cells from the immune system. It prevents antibodies and other immune cells from entering the seminiferous tubules where spermatogenesis occurs.

Identify the components of the blood-testis barrier: The barrier is formed by Sertoli cells, not endothelial cells of blood vessels. Sertoli cells create tight junctions that separate the basal compartment from the adluminal compartment within the seminiferous tubules.

Clarify the role of the blood-testis barrier in testosterone production: The barrier itself does not produce testosterone. Testosterone is produced by Leydig cells located in the interstitial space outside the seminiferous tubules.

Examine the exchange of nutrients and waste: The blood-testis barrier restricts the free exchange of substances between blood and testicular tissue, allowing only selective transport to maintain the environment necessary for sperm development.

Conclude with the correct statement: The blood-testis barrier's primary function is to prevent the passage of antibodies into the seminiferous tubules, protecting developing sperm from immune system attack.