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

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

Which muscles can assist the diaphragm to increase thoracic volume during inhalation?

Internal intercostal muscles

Rectus abdominis

External intercostal muscles

Latissimus dorsi

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Verified step by step guidance

Understand the role of the diaphragm in inhalation: The diaphragm is the primary muscle responsible for increasing thoracic volume during inhalation by contracting and moving downward, which expands the thoracic cavity.

Identify the muscles that assist in increasing thoracic volume: During inhalation, certain muscles work alongside the diaphragm to further increase the volume of the thoracic cavity.

Consider the function of the external intercostal muscles: These muscles are located between the ribs and, when they contract, they elevate the ribs and expand the chest cavity, assisting the diaphragm in increasing thoracic volume.

Evaluate the role of the internal intercostal muscles: These muscles are primarily involved in forced exhalation, as they help to depress the ribs and decrease thoracic volume, which is opposite to the function needed during inhalation.

Analyze the function of the rectus abdominis and latissimus dorsi: The rectus abdominis is involved in flexing the spine and compressing the abdominal cavity, while the latissimus dorsi is primarily involved in movements of the shoulder. Neither of these muscles directly assists in increasing thoracic volume during inhalation.