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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

Which of the following represents the correct flow of air into the lung of a mammal?

Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli

Trachea → Larynx → Pharynx → Nasal cavity → Bronchi → Bronchioles → Alveoli

Larynx → Nasal cavity → Pharynx → Trachea → Bronchi → Alveoli → Bronchioles

Pharynx → Nasal cavity → Larynx → Trachea → Bronchioles → Bronchi → Alveoli

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Verified step by step guidance

Step 1: Begin by understanding the anatomy of the mammalian respiratory system. Air enters the body through the nasal cavity, which is responsible for filtering, warming, and humidifying the air.

Step 2: After passing through the nasal cavity, air moves into the pharynx, a shared pathway for both the respiratory and digestive systems.

Step 3: From the pharynx, air flows into the larynx, which houses the vocal cords and acts as a passageway to the lower respiratory tract.

Step 4: The air then travels down the trachea, a tube reinforced with cartilage rings to prevent collapse, ensuring a clear airway.

Step 5: The trachea branches into bronchi, which further divide into smaller bronchioles, eventually leading to the alveoli, where gas exchange occurs between the air and the bloodstream.