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 does cold air need to be warmed by the nasal cavity and the sinuses?

To enhance the sense of smell by activating olfactory receptors.

To reduce the risk of dehydration by conserving moisture in the air.

To prevent damage to the delicate tissues of the respiratory tract.

To increase the oxygen content of the air before it reaches the lungs.

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Verified step by step guidance

Understand the function of the nasal cavity and sinuses: The nasal cavity and sinuses play a crucial role in conditioning the air we breathe. They help to warm, moisten, and filter the air before it reaches the lungs.

Consider the impact of cold air on respiratory tissues: Cold air can be harsh and potentially damaging to the delicate tissues of the respiratory tract. These tissues are sensitive and can be irritated or damaged by cold, dry air.

Recognize the role of warming air: By warming the air, the nasal cavity and sinuses help to prevent potential damage to the respiratory tract. This warming process ensures that the air reaching the lungs is at a more suitable temperature.

Evaluate the options provided: While enhancing the sense of smell and conserving moisture are functions of the nasal cavity, the primary reason for warming the air is to protect the respiratory tract from damage.

Conclude with the correct reasoning: The main purpose of warming the air in the nasal cavity and sinuses is to prevent damage to the delicate tissues of the respiratory tract, ensuring that the air is at an appropriate temperature for the lungs.