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

21. The Immune System

Introduction to the Immune System

Anatomy & Physiology

21. The Immune System

Introduction to the Immune System

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Multiple Choice

Why does the body often attack a transplanted organ?

The immune system recognizes the organ as foreign and mounts an immune response.

The body lacks the necessary nutrients to support the transplanted organ.

The transplanted organ releases toxins that trigger an immune response.

The transplanted organ fails to produce antibodies needed for immune tolerance.

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Verified step by step guidance

Understand the role of the immune system: The immune system is designed to protect the body from foreign invaders, such as bacteria, viruses, and other pathogens. It does this by recognizing and attacking anything that is perceived as foreign.

Learn about organ transplantation: When an organ is transplanted, it comes from a donor and is introduced into the recipient's body. The immune system may recognize the transplanted organ as foreign because it contains different antigens than those found in the recipient's body.

Explore the concept of immune response: The immune system mounts a response against the transplanted organ by producing antibodies and activating immune cells to attack the perceived foreign tissue. This is known as organ rejection.

Consider the role of immunosuppressive drugs: To prevent organ rejection, recipients are often given immunosuppressive drugs that reduce the activity of the immune system, helping the body to accept the transplanted organ.

Clarify misconceptions: The body does not attack the transplanted organ due to a lack of nutrients, toxin release, or failure to produce antibodies for immune tolerance. The primary reason is the immune system's recognition of the organ as foreign.