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 is the large paired superficial muscle of the lower back?

Erector spinae

Latissimus dorsi

Rhomboid major

Trapezius

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location of the lower back. The lower back is part of the posterior region of the torso, below the thoracic spine and above the pelvis.

Step 2: Review the characteristics of each muscle listed in the options. For example, the latissimus dorsi is a large, paired, superficial muscle that spans the lower back and is involved in movements such as extension, adduction, and internal rotation of the arm.

Step 3: Compare the latissimus dorsi to the other muscles listed. The erector spinae is a group of deep muscles responsible for maintaining posture and extending the spine, while the rhomboid major is located in the upper back and primarily functions to retract the scapula. The trapezius is a large superficial muscle of the upper back and neck, not the lower back.

Step 4: Focus on the term 'large paired superficial muscle' in the question. This description matches the latissimus dorsi, as it is both large and superficial, and it is paired (one on each side of the back).

Step 5: Conclude that the latissimus dorsi is the correct answer based on its anatomical location, size, and superficial nature, as well as its distinction from the other muscles listed.