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

22. The Respiratory System

Introduction to Lung Physiology

Anatomy & Physiology

22. The Respiratory System

Introduction to Lung Physiology

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Multiple Choice

What is the primary function of the trachea in the respiratory system?

To exchange oxygen and carbon dioxide with the blood

To filter and humidify the air before it reaches the lungs

To absorb nutrients from inhaled air

To produce sound by vibrating the vocal cords

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Verified step by step guidance

Begin by identifying the trachea's location and structure within the respiratory system. The trachea, also known as the windpipe, is a tube that connects the larynx to the bronchi of the lungs.

Understand the trachea's role in the respiratory system. It serves as a passageway for air to travel from the external environment to the lungs.

Consider the trachea's specific functions. It is lined with ciliated epithelium and mucus-producing cells that help filter out dust and other particles, preventing them from reaching the lungs.

Recognize the importance of humidifying the air. The trachea adds moisture to the air, which is crucial for maintaining the health of the delicate tissues in the lungs.

Conclude that the primary function of the trachea is to filter and humidify the air before it reaches the lungs, ensuring that the air is clean and at the right humidity level for effective gas exchange in the lungs.