Information AboutNostril |
| CATEGORIES ABOUT NOSTRIL | |
| head and neck | |
| respiratory system | |
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. Note the prominent nostrils.]] A nostril (or '''naris''', pl. ''nares'') is one of the two channels of the Nose , from the point where they bifurcate to the external opening. In Bird s and Mammal s, they contain branched bones or cartilages called Turbinate s, 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 Smell ing which may be called nostrils. The Procellariiformes are distinguished from other birds by having tubular extensions of their nostrils. In Human s, the Nasal Cycle is the normal Ultradian Cycle of each nostril's blood vessels becoming engorged in swelling, then shrinking. During the course of a day, they will switch over approximately every four hours or so, meaning that only one nostril is used at any one time. Nasal Obstruction REFERENCES EXTERNAL LINKS |
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