The respiratory system 陳建榮 http://web.nchu.edu.tw/pweb/index2.php?pid=75&menu=2
Respiratory diverticulum: 4-week embryo Respiratory diverticulum: 4-week embryo 4th pharyngeal arch Laryngotracheal groove喉氣管溝
Respiratory diverticulum tracheal bud 氣管芽 laryngotracheal tube喉氣管管 primary bronchial buds 原始支氣管芽 Tracheoesophageal fold fused esophagus and laryngotracheal tube
Pharynx 咽
咽下隆起 杓狀軟骨腫部 Laryngotracheal groove T-shape laryngeal inlet Hypopharyngeal eminence post. 1/3 portion of tongue and epiglottis
Development of trachea
Tracheal stenosis氣管狹窄
Trachea or esophagus Stenosis Atresia Fistula Tracheal stenosis氣管狹窄 Laryngeal web喉網
Tracheoesophageal fistula 氣管食道瘻管
Esophageal atresia or fistula
Development of lung
Maturation of the lung: Pseudoglandular period假腺體期 6~16 weeks Canalicular period管道化期 16~26 weeks Respiratory bronchioles, alveolar ducts appear Terminal saccular period終囊期 26 weeks ~ birth Blood-air barrier, type I and II alveolar cells apear Alveolar period肺泡期 32 weeks ~ 8 years
Pseudoglandular period假腺體期
Canalicular period管道化期 Alveolar duct
Terminal saccular period終囊期
Alveolar period肺泡期