Herpetology Quiz #2

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Neurocranium

Comprises the skeleton surrounding the brain and the sense organs (olfactory, optic, and otic capsules)
"Skull adaptations that lead to breathing air"- Start with Sharks (primitive fish)

Sharks only have external nares, which allows water to flow into contact with olfactory cells and evaluate chemical surroundings.
Blind alley

Water flows into and out of the opening to allow the shark to evaluate its surrounding. External nares open into a blind alley.