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 represents the lateral muscle group of the erector spinae?

Semispinalis

Longissimus

Iliocostalis

Spinalis

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Verified step by step guidance

Step 1: Understand the anatomy of the erector spinae muscle group. The erector spinae is a group of muscles and tendons that run vertically along the spine and are responsible for extending and stabilizing the vertebral column.

Step 2: Break down the erector spinae into its three main muscle groups: spinalis (medial group), longissimus (intermediate group), and iliocostalis (lateral group). Each group has distinct anatomical positions and functions.

Step 3: Focus on the iliocostalis muscle, which is the lateral-most muscle of the erector spinae. It is located closest to the ribs and plays a role in lateral flexion and extension of the spine.

Step 4: Compare the iliocostalis with the other options provided: spinalis (medial), longissimus (intermediate), and semispinalis (not part of the erector spinae but rather part of the transversospinalis group). This comparison helps confirm that iliocostalis is the lateral muscle group.

Step 5: Conclude that the iliocostalis is the correct answer based on its anatomical position and function as the lateral muscle group of the erector spinae.