naris surface structure external naris EHDAA2:0001275 naris SCTID:276165005 XAO:0003033 ZFA:0000550 TAO:0000550 NCIT:C33178 EMAPA:17848 A naris that provides one of the small external openings of the head that give passage to air for breathing. AAO:0010358 nostril UMLS:C0595944 AAO:0000024 AAO:0000983 MA:0001320 external nares EHDAA:9085 FMA:59645 Wikipedia:Nostril VHOG:0000544 blowhole