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 alveoli in the lungs?

To filter out dust and pathogens from inhaled air

To regulate the temperature of inhaled air

To facilitate the exchange of oxygen and carbon dioxide between the air and blood

To produce mucus that traps foreign particles

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Verified step by step guidance

Understand the structure of alveoli: Alveoli are tiny air sacs located at the end of bronchioles in the lungs. They are surrounded by a network of capillaries.

Recognize the role of alveoli in gas exchange: The primary function of alveoli is to facilitate the exchange of gases, specifically oxygen and carbon dioxide, between the air and the blood.

Identify the process of gas exchange: Oxygen from inhaled air diffuses through the walls of the alveoli into the blood in the capillaries, while carbon dioxide from the blood diffuses into the alveoli to be exhaled.

Consider the structure-function relationship: The thin walls of the alveoli and their large surface area are crucial for efficient gas exchange, allowing for rapid diffusion of gases.

Clarify misconceptions: While alveoli do not filter dust or pathogens, regulate temperature, or produce mucus, these functions are performed by other parts of the respiratory system, such as the nasal passages and bronchi.