咳嗽与排痰是人体的生理现象,当肺部、支气管、气管及咽喉、鼻腔感染或受异物刺激时,咳嗽反射系统的神经末梢就产生了保护性功能——咳嗽,并将呼吸道的废物——痰,清除于体外。 在正常情况下,健康人无痰或偶有少量的稀痰。但病态、尤其是呼吸系统的炎症,呼吸道粘膜分泌物与渗出的血液蛋白质、红细胞、白细胞、脓细胞及脱落的上皮细胞、含铁血黄素、变性血红蛋白、细菌、病毒、霉菌等粘合成痰液而排出。医生们可利用这种排泄物的化学、生物学等各种性质 Cough and expectoration are physiological phenomena in the body. When the lung, bronchus, trachea and throat, nasal infection or foreign body stimulation, the nerve endings of the cough reflex system produce a protective function - cough, and the respiratory waste - - Phlegm, clear in vitro. Under normal circumstances, healthy people without sputum or occasionally a small amount of sputum. However, pathologies, especially respiratory inflammation, respiratory mucosal secretions and exudative blood proteins, erythrocytes, leukocytes, pus and exfoliated epithelial cells, hemosiderin, denatured hemoglobin, bacteria, viruses, molds and the like are bonded Sputum discharge. Doctors can take advantage of the chemical, biological and other properties of this excrement