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 muscle fiber arrangement is characteristic of the pectoralis major muscle?

Convergent

Parallel

Pennate

Circular

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Verified step by step guidance

Step 1: Understand the different types of muscle fiber arrangements. Muscle fibers can be arranged in various patterns, including convergent, parallel, pennate, and circular. Each arrangement has distinct structural and functional characteristics.

Step 2: Define the convergent arrangement. In a convergent muscle, the fibers originate from a broad area and converge to a single point, typically at a tendon. This arrangement allows for versatile movement and force generation.

Step 3: Relate the convergent arrangement to the pectoralis major muscle. The pectoralis major is a large, fan-shaped muscle located in the chest. Its fibers spread out widely from the sternum and clavicle and converge at the humerus, making it a classic example of a convergent muscle.

Step 4: Compare the other options. Parallel muscles have fibers running parallel to the long axis of the muscle, pennate muscles have fibers arranged at an angle to the tendon, and circular muscles form rings around openings. None of these arrangements match the structure of the pectoralis major.

Step 5: Conclude that the characteristic muscle fiber arrangement of the pectoralis major is convergent, based on its fan-shaped structure and the way its fibers converge at a single insertion point.