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

Why is it advantageous for the lungs to have a spongy structure rather than being empty like a balloon?

A spongy structure makes the lungs lighter and less functional.

A spongy structure increases the surface area for gas exchange.

A spongy structure allows the lungs to store more blood.

A spongy structure prevents the lungs from expanding during inhalation.

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Verified step by step guidance

Understand the primary function of the lungs: The lungs are responsible for gas exchange, specifically the intake of oxygen and the removal of carbon dioxide. This process occurs in the alveoli, which are tiny air sacs within the lungs.

Recognize the importance of surface area in gas exchange: The spongy structure of the lungs, composed of millions of alveoli, significantly increases the surface area available for gas exchange. This is crucial for efficient oxygen absorption and carbon dioxide removal.

Compare the spongy structure to a balloon-like structure: If the lungs were empty like a balloon, they would have far less surface area for gas exchange, making them less effective at performing their primary function.

Evaluate the incorrect options: A spongy structure does not make the lungs lighter and less functional; it enhances their functionality. It does not store more blood, as the lungs are primarily involved in air exchange, not blood storage. Additionally, a spongy structure does not prevent the lungs from expanding during inhalation; it facilitates expansion and contraction.

Conclude why the spongy structure is advantageous: The spongy structure of the lungs is essential for maximizing the surface area for gas exchange, which is vital for maintaining proper oxygen and carbon dioxide levels in the body.