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 the Immune System

Anatomy & Physiology

21. The Immune System

Introduction to the Immune System

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Multiple Choice

Which cells are the first to arrive at the site of an infection?

Basophils

Eosinophils

Neutrophils

Lymphocytes

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Understand the role of different white blood cells in the immune response. Each type of cell has a specific function in fighting infections.

Neutrophils are a type of white blood cell that are part of the innate immune system. They are known for their ability to quickly respond to infection.

Neutrophils are often the first responders to microbial infection. They migrate rapidly to the site of infection in response to chemical signals.

Once at the site of infection, neutrophils perform phagocytosis, engulfing and destroying pathogens.

Other white blood cells, such as lymphocytes, eosinophils, and basophils, arrive later and have different roles, such as producing antibodies or mediating allergic responses.