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 difference between internal and external respiration?

Internal respiration is the movement of air into the lungs, while external respiration is the movement of air out of the lungs.

Internal respiration involves gas exchange between the blood and body tissues, while external respiration involves gas exchange between the lungs and the external environment.

Internal respiration is the process of inhaling oxygen, while external respiration is the process of exhaling carbon dioxide.

Internal respiration occurs in the lungs, while external respiration occurs in the heart.

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Verified step by step guidance

Understand the definitions: Internal respiration refers to the exchange of gases between the blood and body tissues, while external respiration refers to the exchange of gases between the lungs and the external environment.

Identify the locations: Internal respiration occurs at the cellular level within body tissues, whereas external respiration takes place in the alveoli of the lungs.

Recognize the processes involved: Internal respiration involves the diffusion of oxygen from the blood into the tissues and carbon dioxide from the tissues into the blood. External respiration involves the diffusion of oxygen from the alveoli into the blood and carbon dioxide from the blood into the alveoli.

Clarify the roles: Internal respiration is crucial for delivering oxygen to cells for cellular respiration and removing carbon dioxide, a waste product. External respiration is essential for replenishing oxygen in the blood and expelling carbon dioxide from the body.

Differentiate the physiological mechanisms: Internal respiration is driven by the concentration gradients of gases between blood and tissues, while external respiration is driven by the concentration gradients of gases between alveolar air and blood.