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

Muscle Naming

Anatomy & Physiology

10. Muscles

Muscle Naming

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Multiple Choice

Based on the name, how would you expect the orbicularis oris muscle to be shaped?

Triangular.

Comb-like.

Circular.

Serrated.

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Verified step by step guidance

Understand the naming conventions in anatomy: Muscles are often named based on their shape, location, or function. The term 'orbicularis' suggests a circular or ring-like shape.

Break down the name 'orbicularis oris': 'Orbicularis' comes from the Latin 'orbiculus,' meaning small circle or disk, and 'oris' refers to the mouth. This indicates the muscle is circular and surrounds the mouth.

Visualize the location and function: The orbicularis oris muscle encircles the mouth and is responsible for movements such as puckering the lips, which requires a circular muscle structure.

Compare with other muscle shapes: Triangular muscles, like the deltoid, have a different function and location. Comb-like or serrated muscles, such as the serratus anterior, have distinct appearances and functions.

Conclude based on anatomical terminology: Given the name 'orbicularis oris,' the muscle is expected to be circular, as it is involved in actions that require a circular motion around the mouth.