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

21. The Immune System

Introduction to Innate Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Innate Immunity

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Multiple Choice

Which of the following is not a defense mechanism of the human body?

Mucous membranes

Liver

Skin

White blood cells

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Understand the concept of defense mechanisms in the human body, which are structures or processes that protect against disease and infection.

Identify the role of mucous membranes: They line various cavities in the body and secrete mucus, which traps pathogens and particles, acting as a defense mechanism.

Consider the function of the skin: It acts as a physical barrier to protect internal organs from pathogens, making it a key component of the body's defense system.

Examine the role of white blood cells: These cells are part of the immune system and help to identify and destroy pathogens, thus serving as a defense mechanism.

Analyze the function of the liver: While the liver plays a crucial role in detoxification and metabolism, it is not primarily a defense mechanism against pathogens like the other options listed.