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nose
(nōz)
the specialized structure of the face that serves both as the organ of smell and as a means of bringing air into the lungs. The nostrils, which form the external entrance of the nose, lead into the two nasal cavities, which are separated from each other by the nasal septum, a partition formed of cartilage and bone. Three bony ridges project from the outer wall of each nasal cavity and partially
divide the cavity into three air passages. At the back of the nose these passages lead into the pharynx. The passages also are connected by openings with the paranasal sinuses. One of the functions of the nose is to drain fluids discharged from the sinuses. The nasal cavities also have a connection
with the ears by the eustachian tubes, and with the region of the eyes by the nasolacrimal ducts.
artificial nose
a device placed between the endotracheal tube and the breathing apparatus to trap the heat and humidity in the exhaled gas
and use it to warm and humidify subsequently inhaled gas.
an electronic system used to monitor and classify odors and gases, consisting of a sensor and a pattern recognition system;
called also electric nose.
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