The nasal cavities and oral cavity merge into the pharynx. What keeps food and drink from going into the nasal cavity rather than down the esophagus?

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    The esophagus constricts at the upper end of the pharynx so the entry to the nasal cavities is blocked.
    Breathing is temporarily stopped so that the nasal cavities can close when swallowing.
    The soft palate moves up against the opening to the nasal cavities, blocking the entryway.
    The tongue blocks the upper pharynx leading into the nasal cavities.

asked May 30, 2013 in Biology by anonymous
    

1 Answer

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The soft palate moves up against the opening to the nasal cavities, blocking the entryway.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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