Which bone listed forms part of the orbital cavity?

Prepare for AAMI Anatomy 1. Utilize flashcards, multiple choice questions with explanations, and detailed study aids. Succeed on your exam!

Multiple Choice

Which bone listed forms part of the orbital cavity?

Explanation:
The orbital cavity is formed by several skull bones, and the sphenoid contributes to the orbit, especially its posterior wall and the orbital apex. The sphenoid bone houses important openings like the optic canal and helps shape the back of the eye socket. The other options—ulna, tibia, and humerus—are limb bones and do not participate in forming the eye socket. So the bone that forms part of the orbital cavity is the sphenoid.

The orbital cavity is formed by several skull bones, and the sphenoid contributes to the orbit, especially its posterior wall and the orbital apex. The sphenoid bone houses important openings like the optic canal and helps shape the back of the eye socket. The other options—ulna, tibia, and humerus—are limb bones and do not participate in forming the eye socket. So the bone that forms part of the orbital cavity is the sphenoid.

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