initial opening of the nasal pits and olfactory sac of the embryo into the rostral part of the primordial oronasal cavity, before the formation of the secondary palate. [ http://www.drugs.com/dict/primary-choana.html ]

This is just here as a test because I lose it

Term information

definition

initial opening of the nasal pits and olfactory sac of the embryo into the rostral part of the primordial oronasal cavity, before the formation of the secondary palate.

editor note

TODO - check. MA says part_of external naris.

id

UBERON:0005931