Hagfish Sign Video
Upload On Wed Jul 16 2014 by ASL STEM
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Definition
Hagfishes posses a single nostril placed terminally at the anterior end of the head. Water enters this single nasal opening, passes down the nasohypophyseal duct, and over an unpaired nasal sac on its way to the pharynx and gills.
Source: Kardong, K. V. Vertebrates Comparative Anatomy, Function, Evolution. (3rd edition), 2002.
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