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鼻子位于脸部中央。鼻腔为一顶窄底宽、前后径大于左右径的不规则狭长腔隙。前鼻孔与鼻腔之间的部分叫鼻前庭,鼻前庭覆盖着皮肤,上面生长着许多长短不一的鼻毛,并富有皮脂腺和汗腺。鼻子是呼吸的通道,人体吸人空气,鼻毛就是呼吸道的第一关。当人呼吸时空气通过鼻腔,空气中混杂的细菌和尘埃,大多数被鼻毛挡于门外,也就是说,鼻毛对吸入空气起着一定的过滤作用。
The nose is in the middle of the face. The nasal cavity is a narrow narrow bottom width, anteroposterior diameter is larger than the left and right diameter of the irregular narrow long gap. The part between the anterior nostril and the nasal cavity is called the nasal vestibule. The nasal vestibule covers the skin and grows with many different lengths of nose hair and sebaceous glands and sweat glands. The nose is the breathing channel, the human body to inhale the air, nose hair is the first pass of the respiratory tract. When people breathe air through the nasal cavity, mixed bacteria and dust in the air, most of the nose hair blocked in the door, that is, the nose hair on the inhalation of air play a role in filtering.