Multiple Choice
Which bone forms part of the floor of the cranium?
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7. The Skeletal System
Introduction to the Skeleton
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Which one of the following bones does not contain paranasal sinuses?
A
Temporal bone
B
Ethmoid bone
C
Frontal bone
D
Sphenoid bone
Verified step by step guidance1
Understand the concept of paranasal sinuses: Paranasal sinuses are air-filled spaces within the bones surrounding the nasal cavity. They are lined with mucous membranes and help lighten the weight of the skull, produce mucus, and contribute to voice resonance.
Identify the bones that typically contain paranasal sinuses: The bones that contain paranasal sinuses are the frontal bone, ethmoid bone, sphenoid bone, and maxillary bone.
Review the list of bones provided in the problem: Temporal bone, Ethmoid bone, Frontal bone, Sphenoid bone.
Compare the list of bones with paranasal sinuses to the list provided in the problem: The temporal bone is not typically associated with paranasal sinuses.
Conclude that the temporal bone does not contain paranasal sinuses, while the ethmoid, frontal, and sphenoid bones do contain them.
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