Chapter 24 Development/of digestive and respiratory system
Chapter 24 Development of digestive and respiratory system
digestive and respiratory system derived from primitive gut /foregut /midgut /hindgut ---epi. of digestive and respiratory system derived from endoderm ---ct and mt of digestive and respiratory system derived from splanchnic or visceral mesoderm
* digestive and respiratory system derived from primitive gut /foregut /midgut /hindgut ---epi. of digestive and respiratory system derived from endoderm ---CT and MT of digestive and respiratory system derived from splanchnic or visceral mesoderm
喉气管 酿室 O干 所—飞 心彭人 6+芽 中肠拌(不 背既 霜 中肠裤 胰 尿囊
1. Development of digestive system 1)derivatives of pharyngeal pouch pharyngeal pouch /outpocketings of endodermal lining of the primary pharynx (extends from the buccopharyngeal membrane the tracheobronchial diverticulum) /5 pairs 第⊥咽囊 2咽囊 第3咽囊Z 第4咽囊 第5咽囊
1. Development of digestive system 1) derivatives of pharyngeal pouch ---pharyngeal pouch: /outpocketings of endodermal lining of the primary pharynx (extends from the buccopharyngeal membrane to the tracheobronchial diverticulum) /5 pairs
derivatives of pharyngeal pouch (1 First pharyngeal pouch ---distal portion widen into a sac-like structure- middle ear cavity, the branchial membrane form tympanic membrane or eardrum proximal part: remain/ narrow to form the pharyngotympanic or Eustachian tube 咽鼓管 鼓 舌 腭扁桃体窝
---derivatives of pharyngeal pouch: ① First pharyngeal pouch: ---distal portion: widen into a sac-like structuremiddle ear cavity, the branchial membrane form tympanic membrane or eardrum ---proximal part: remain narrow to form the pharyngotympanic or Eustachian tube