This unpaired cranial bone forms the posterior side of both orbital cavities. For 10 points each:
[10h] Name this butterfly-shaped bone that articulates with the anterior section of the basilar occipital bone. This bone’s sella turcica contains the pituitary gland.
ANSWER: sphenoid bone
[10e] Another unpaired cranial bone, the ethmoid bone, articulates with the sphenoid bone at the base of this structure. This structure is divided by a septum made of cartilage, and it transmits sensory signals to the brain via olfactory bulbs.
ANSWER: nose [accept nasal septum; accept nasal cavity]
[10m] The sphenoid bone also articulates with an unpaired cranial bone described by this adjective. That bone protects a larger “cortex” described by this adjective, which contains the primary motor cortex.
ANSWER: frontal bone [accept frontal cortex; accept frontal lobe; accept prefrontal cortex]
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