小儿呼吸系统解剖生理、免疫特点戴德和(洛阳医专儿科主治医师) 肺炎是小儿时期的常见病,年龄越小,发病率及病死率越高,这与小儿呼吸系统解剖生理、免疫特点有关。一、小儿呼吸道解剖生理特点: 1、上下呼吸道的分界:(1)上呼吸道由鼻、咽、喉组成,气管以下为下呼吸道;(2)1976年Benfer提出:以有无纤毛上皮细胞为界,即在 Pediatric respiratory system anatomy and physiology, immune characteristics Diand and (Luoyang Medical Pediatrics Attending Physician) Pneumonia is a common childhood disease, the younger, the higher the incidence and mortality, which is related to pediatric respiratory anatomy and physiology, immune characteristics . First, pediatric respiratory anatomy and physiological characteristics: 1, the upper and lower respiratory tract boundaries: (1) the upper respiratory tract by the nose, throat, throat composition, the trachea following the lower respiratory tract; (2) 1976, Benfer proposed: with or without ciliated epithelial cells That is