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

10. Muscles

Origin and Insertion

Anatomy & Physiology

10. Muscles

Origin and Insertion

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Multiple Choice

Where do all of the fibers of the latissimus dorsi muscle distally attach?

Greater tubercle of the humerus

Coracoid process of the scapula

Intertubercular sulcus of the humerus

Olecranon process of the ulna

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Verified step by step guidance

Step 1: Begin by identifying the latissimus dorsi muscle, which is a large, flat muscle located in the lower back. It plays a role in movements such as extension, adduction, and medial rotation of the arm.

Step 2: Understand the concept of muscle attachment points. Muscles have two main attachment sites: the origin (proximal attachment) and the insertion (distal attachment). The insertion is where the muscle attaches to the bone that moves during contraction.

Step 3: Recall the anatomy of the humerus, specifically the intertubercular sulcus (also known as the bicipital groove). This groove is located between the greater and lesser tubercles of the humerus and serves as a site for muscle attachment.

Step 4: Note that the latissimus dorsi muscle fibers converge and distally attach to the intertubercular sulcus of the humerus. This attachment allows the muscle to exert its actions on the arm.

Step 5: Eliminate the other options provided: the greater tubercle of the humerus, coracoid process of the scapula, and olecranon process of the ulna, as these are not the correct distal attachment sites for the latissimus dorsi muscle.