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 muscle called that is primarily responsible for breathing?

Rectus abdominis

Diaphragm

Trapezius

Pectoralis major

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Verified step by step guidance

Identify the primary function of each muscle listed in the options to understand their roles in the body.

The Rectus abdominis is a muscle located in the front of the abdomen. It is primarily responsible for flexing the lumbar spine and is not involved in the breathing process.

The Trapezius is a large muscle in the upper back and neck area. It is mainly responsible for moving, rotating, and stabilizing the scapula and extending the neck, not for breathing.

The Pectoralis major is a thick, fan-shaped muscle situated at the chest. It is primarily responsible for movements of the shoulder joint, such as flexion, adduction, and internal rotation, and does not play a direct role in breathing.

The Diaphragm is a dome-shaped muscle located at the base of the lungs. It is the primary muscle responsible for breathing, as it contracts and flattens to increase the volume of the thoracic cavity, allowing air to be drawn into the lungs.