什么是痰痰在医学上的定义是指肺及支气管等鼻腔以下的呼吸管道的黏膜所分泌、用来把异物排出体外的黏液,特别是指经过咳嗽吐出来的分泌物。痰从哪里来,又到哪里去在人的呼吸道里,许多小纤毛像麦浪一样朝向口腔的方向,慢慢将脏东西运出来,推到嗓子眼儿时,人就会咳嗽、吐痰。健康人 What is phlegm in the medical definition refers to the lungs and bronchial nasal cavity and other respiratory mucosa secreted by the foreign body used to excrete mucus, especially refers to the secretion of cough spit out. Where does phlegm come from? Where are you going? In the human respiratory tract, many cilia run toward the mouth like wheat waves and slowly carry the dirt out. When they are pushed into the throat, they cough and spit. healthy person