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

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

Where does the respiratory zone of the lungs begin?

At the alveolar ducts

At the terminal bronchioles

At the respiratory bronchioles

At the trachea

Previous problemNext problem

Verified step by step guidance

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

Identify the components of the conducting zone: The conducting zone consists of the trachea, bronchi, bronchioles, and terminal bronchioles. These structures are primarily involved in the movement of air and do not participate in gas exchange.

Recognize the beginning of the respiratory zone: The respiratory zone starts at the respiratory bronchioles. These are the first structures where gas exchange begins, as they contain alveoli, which are tiny air sacs where oxygen and carbon dioxide are exchanged.

Differentiate between terminal bronchioles and respiratory bronchioles: Terminal bronchioles are the last part of the conducting zone and do not have alveoli. Respiratory bronchioles, on the other hand, are part of the respiratory zone and have alveoli, making them the starting point for gas exchange.

Conclude the location of the respiratory zone: Based on the structure and function of the respiratory system, the respiratory zone begins at the respiratory bronchioles, where the presence of alveoli allows for gas exchange.