Certainly he was...

   Narina is nostril, as far as I know. Obviously there are the nariz do cachorro (snout) which he put his paws ahead it to scat away flies or when he´s sleeping.

   In medicine there is the nasal vestibule: air passages separated by the septum in your nose in the nasal cavity.

   Nasal cavity being the the nose internal area.

   Nostrils are also known in medical circles as external nares (opening of the nose), from what I read in websites.