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 of the following muscles is commonly present in anatomical diagrams of the upper arm but is often not specifically labeled by a letter?

Triceps brachii

Coracobrachialis

Deltoid

Biceps brachii

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location of the upper arm. The upper arm is the region between the shoulder and the elbow, containing several muscles responsible for movement and stabilization.

Step 2: Review the primary muscles of the upper arm. These include the biceps brachii (responsible for flexion of the elbow), triceps brachii (responsible for extension of the elbow), deltoid (responsible for shoulder abduction), and coracobrachialis (responsible for flexion and adduction of the shoulder).

Step 3: Understand the role of the coracobrachialis muscle. It is a smaller muscle located deep in the upper arm, near the medial side, and is often overshadowed by larger muscles like the biceps brachii and triceps brachii in anatomical diagrams.

Step 4: Recognize that the coracobrachialis is frequently present in anatomical diagrams but may not be labeled due to its smaller size and less prominent role compared to the other muscles listed.

Step 5: Conclude that while the biceps brachii, triceps brachii, and deltoid are commonly labeled in diagrams due to their prominence, the coracobrachialis is often included but not specifically labeled, making it the correct answer to the question.