Questions: A. lateral pterygoid process B. perpendicular plate C. styloid process D. lesser wing E. manubrium

A. lateral pterygoid process B. perpendicular plate C. styloid process D. lesser wing E. manubrium
Transcript text: A. lateral pterygoid process B. perpendicular plate C. styloid process D. lesser wing E. manubrium
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Solution

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Solution Steps

Step 1: Identify the anatomical structure in the image

The image shows the base of the skull from an inferior view. The structure in question is located near the center of the skull base, slightly anterior to the large opening (foramen magnum).

Step 2: Analyze the options provided
  • A. Lateral pterygoid process: Part of the sphenoid bone, located laterally.
  • B. Perpendicular plate: Part of the ethmoid bone, located in the nasal cavity.
  • C. Styloid process: A slender pointed piece of bone just below the ear.
  • D. Lesser wing: Part of the sphenoid bone, located anteriorly and superiorly.
  • E. Manubrium: Part of the sternum, not part of the skull.
Step 3: Determine the correct answer

The structure indicated by the question mark is the lesser wing of the sphenoid bone, which is located anteriorly and superiorly in the base of the skull.

Final Answer

D. Lesser wing

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