Table of contents

Skip topic navigation

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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

What is the process of external respiration?

The exchange of gases between the blood and the tissues

The movement of air into and out of the lungs

The exchange of gases between the alveoli and the blood in the pulmonary capillaries

The transport of oxygen in the blood to the tissues

Previous problemNext problem

Verified step by step guidance

Understand that external respiration refers to the exchange of gases between the alveoli in the lungs and the blood in the pulmonary capillaries.

Recognize that during external respiration, oxygen from the air in the alveoli diffuses into the blood in the pulmonary capillaries.

Note that carbon dioxide, a waste product from metabolism, diffuses from the blood in the pulmonary capillaries into the alveoli to be exhaled.

Consider the role of partial pressure gradients, which drive the diffusion of gases. Oxygen moves from an area of higher partial pressure in the alveoli to a lower partial pressure in the blood.

Remember that external respiration is crucial for maintaining the oxygen and carbon dioxide balance in the body, enabling efficient cellular respiration and energy production.