nose
Nose, also known as the nose, is the organ of animal respiration, is part of the respiratory system, but also mammals induction olfactory organs. Nose generally in the animal's head, may be uplift, nose on the opening of the body called the nostrils, nostrils let the air into the nasal cavity, the two holes air velocity is different, and every few hours will be exchanged once. Nose has two lumens, separated by nasal septum, mammalian nasal cavity is usually long nose hair, the role is to filter and absorb the air floating dust and impurities, nasal wall mucosa, help in the inhalation of air, and impose impurities. Nasal cavity is the end of the sinus, located on both sides of the nose under the skull, is the sense of olfactory nerve, nasal cavity connected to the throat, and the digestive system with the pipeline, and then into the respiratory system to the lungs. The nose of mankind is in the middle of the face. In addition to animals, the nose can also be used to describe things similar to the nose, such as the front of the aircraft will be called nose. ...