Disease of the Respiratory system in Children Ji Hong,Department of Pediatrics , The first Clinical Hospital , Dalian Medical University Introduction l The disease of respiratory system is one of the most frequent reasons for hospitalization of infants and children. l Basic knowledge of the development and functions of respiratory system are essential 上、下呼吸道 cricoid cartilage 环状软骨 1. characteristics of respiratory system The upper airway nose; paranasal sinuses; pharynx; larynx； Eus
