claim: Commodore is used in many navies.
evidence: A nostril -LRB- or naris -LSB- ˈneɪrᵻs -RSB- , plural nares -LSB- ˈneɪriːz -RSB- -RRB- is one of the two channels of the nose , from the point where they bifurcate to the external opening .. nose. nose. In birds and mammals , they contain branched bones or cartilages called turbinates , whose function is to warm air on inhalation and remove moisture on exhalation .. Fish do not breathe through their noses , but they do have two small holes used for smelling , which may , indeed , be called nostrils .. Fish. Fish. smelling. olfaction. The Procellariiformes are distinguished from other birds by having tubular extensions of their nostrils .. Procellariiformes. Procellariiformes. In humans , the nasal cycle is the normal ultradian cycle of each nostril 's blood vessels becoming engorged in swelling , then shrinking .. nasal cycle. nasal cycle. ultradian cycle. Ultradian. The nostrils are separated by the septum .. septum. Nasal septum. The septum can sometimes be deviated , causing one nostril to appear larger than the other .. septum. Nasal septum. deviated. Deviated septum. With extreme damage to the septum and columella , the two nostrils are no longer separated and form a single larger external opening .. septum. Nasal septum. Like other tetrapods , humans have two external nostrils -LRB- anterior nares -RRB- and two additional nostrils at the back of the nasal cavity , inside the head -LRB- posterior nares , posterior nasal apertures or choanae -RRB- .. Each choana contains approximately 1000 strands of nasal hair .. choana. choana. nasal hair. nasal hair. They also connect the nose to the throat -LRB- the nasopharynx -RRB- , aiding in respiration .. nose. nose. Though all four nostrils were on the outside the head of our fish ancestors , the nostrils for outgoing water -LRB- excurrent nostrils -RRB- migrated to the inside of the mouth , as evidenced by the discovery of Kenichthys campbelli , a 395-million-year-old fossilized fish which shows this migration in progress .. Kenichthys campbelli. Kenichthys. It has two nostrils between its front teeth , similar to human embryos at an early stage .. human. human. If these fail to join up , the result is a cleft palate .. cleft palate. cleft palate. It is possible for humans to smell different olfactory inputs in the two nostrils and experience a perceptual rivalry akin to that of binocular rivalry when there are two different inputs to the two eyes .. olfactory. olfactory. binocular rivalry. binocular rivalry