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

The respiratory portion in the lungs is composed of which structures?

Alveoli

Larynx

Trachea

Bronchi

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Verified step by step guidance

Understand the structure of the respiratory system: The respiratory system is divided into the conducting portion and the respiratory portion. The conducting portion includes structures that transport air to the lungs, while the respiratory portion is where gas exchange occurs.

Identify the structures involved in the conducting portion: The conducting portion includes the nasal cavity, pharynx, larynx, trachea, bronchi, and bronchioles. These structures are responsible for filtering, warming, and humidifying the air before it reaches the lungs.

Focus on the respiratory portion: The respiratory portion is specifically involved in the exchange of gases (oxygen and carbon dioxide) between the air and the blood. This is where the actual process of respiration takes place.

Recognize the key structure in the respiratory portion: The alveoli are the primary structures in the respiratory portion of the lungs. They are tiny air sacs where the exchange of gases occurs. The walls of the alveoli are thin and surrounded by capillaries to facilitate efficient gas exchange.

Differentiate between the options: Among the given options, only the alveoli are part of the respiratory portion. The larynx, trachea, and bronchi are part of the conducting portion, responsible for air passage but not directly involved in gas exchange.