part of part of connects connects capable of part of capable of part of contributes to morphology of respiratory gaseous exchange by respiratory system naris nose nasal cavity 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 relationship loss: subclass nasal opening (AAO:0000316)[AAO] UMLS:C0595944 AAO:0000024 AAO:0000983 MA:0001320 anterior naris Hole on the nasal capsule that connects the nasal cavity with the exterior.[AAO] external nares EHDAA:9085 FMA:59645 Wikipedia:Nostril anterior nares UBERON:0005928 VHOG:0000544 Fish have two pairs of external nostrils. In a tetrapod, the nasal sac has an external naris (homologous with the anterior naris of the fish) (...).[well established][VHOG] blowhole space surrounding organism