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

1. Introduction to Anatomy & Physiology

Anatomical Terms for the Head and Neck

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Anatomical Terms for the Head and Neck

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Multiple Choice

Which of these projections of the ethmoid bone are most visible in the nasal cavity?

Superior orbital fissure

Crista galli

Perpendicular plate

Middle nasal conchae

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Verified step by step guidance

Step 1: Understand the anatomy of the ethmoid bone. The ethmoid bone is a complex structure located between the eyes and forms part of the nasal cavity and the orbit. It has several projections, including the crista galli, perpendicular plate, and middle nasal conchae.

Step 2: Review the function and location of the middle nasal conchae. The middle nasal conchae are curved bony projections that extend into the nasal cavity. They play a role in increasing the surface area for air filtration and humidification.

Step 3: Compare the visibility of the listed structures in the nasal cavity. The superior orbital fissure is part of the sphenoid bone and is not visible in the nasal cavity. The crista galli is a vertical projection of the ethmoid bone but is located in the cranial cavity, not the nasal cavity. The perpendicular plate forms part of the nasal septum but is less prominent compared to the middle nasal conchae.

Step 4: Identify the most visible projection of the ethmoid bone in the nasal cavity. The middle nasal conchae are prominently visible within the nasal cavity due to their location and function.

Step 5: Conclude that the middle nasal conchae are the correct answer based on their anatomical position and visibility in the nasal cavity.