Presentation is loading. Please wait.

Presentation is loading. Please wait.

Development of digestive system and respiratory system 1.Primitive gut 2.Development of primary pharynx 3.Development of esophagus and stomach 4.Intestinal.

Similar presentations


Presentation on theme: "Development of digestive system and respiratory system 1.Primitive gut 2.Development of primary pharynx 3.Development of esophagus and stomach 4.Intestinal."— Presentation transcript:

1

2 Development of digestive system and respiratory system 1.Primitive gut 2.Development of primary pharynx 3.Development of esophagus and stomach 4.Intestinal development 5.Development of liver, gall bladder and pancreas 6.Development of larynx, trachea and lung

3 Primitive gut Primitive gut : 3rd ~ 4th week Endoderm→ primitive gut buccopharyngeal membrane (breach at 4th week) → cloacal membrane (breach at 8th week) foregut, midgut and hindgut Vitelline stalk (atresia at 6th week)

4 Vitelline stalk ForegutMidgutHindgut Allantois

5 Foregut Hindgut

6 Development of primary pharynx Primary pharynx : flattened funnel Pharyngeal pouch : 5 pairs First : branchial membrane →tympanic membrane outer portion →tympanic cavity inner portion →pharyngotympanic tube

7 Second : outer portion → degeneration inner portion →tonsil Third : ventral portion →thymus dorsal portion → inferior parathyroid gland Fourth : ventral portion →degeneration dorsal portion → superior parathyroid gland Fifth : ultimobranchial body →parafollicular cell

8

9 External acoustic meatus thymus superior parathyroid gland inferior parathyroid gland thyroid Palatine tonsil tympanic membrane pharyngotympanic tube tympanic cavity

10 Development of esophagus and stomach 1. Esophagus : primitive gut between laryngotracheal diverticulum and stomach 2. Stomatch : a dilation at the end of foregut

11 Development of esophagus ② simple → stratified ① prolong ③ reconstitution of lumen

12 Development of stomach a dilation at the end of foregut

13 Dorsal convex left Ventral concave right

14 Dorsal mesogastrium Right Ventral mesogastrium Left

15 Liver End Head Duodenum

16 Intestinal development 1. Evolvement of midgut ① Midgut loop : 5th week ② Physiological umblical herniation: 6th week ③ Counter-clockwise 90°rotation, caecal swelling 6th to 8th week ④ Counter-clockwise 180°rotation 10th week

17

18 A BC D

19 2. Evolvement of hindgut Compartmentation of cloaca: urorectal septum (6-7th week) Anorectal canal (dorsal) Cloaca Urogenital sinus (ventral) Anal membrane (dorsal) Cloacal membrane Urogenital membrane (ventral)

20 Urorectal septum Anorectal canal Urogenital sinus Urogenital membrane Anal membrane

21 Development of liver, gall bladder and pancreas Time4th week End of foregut Hepatic diverticulum Head Tail Hepatic cord Gall bladder Mesenchyme Stroma, Capsule Process 1. Development of liver, gall bladder

22 Hepatic cord → Hepatic plate Vitelline vein and umbilical vein → Hepatic sinusoid Bile canaliculus: 6th week Hematopoietic stem cell: 6th week Hepatic lobule : 9-10th week

23 2. Development of pancreas End of foregut 4th week Dorsal parentic bud Ventral parentic bud Left Right Fusion Rotation Pancreas Above of hepatic diverticulum Under hepatic diverticulum Dorsal pancreas Ventral pancreas

24 但怪但但怪但 Head of hepatic diverticulum End of hepatic diverticulum Dorsal pancreatic bud Ventral pancreatic bud

25 碱 Dorsal pancreas Ventral pancreas Liver Gall bladder

26 Dorsal pancreas Ventral pancreas

27 Dorsal pancreas Main pancreatic duct Accessory pancreatic duct Duodenum Pancreas islet: function from 5th month

28 Abnormality of digestive system  1.Meckel ’ s diverticulum 2. Umbilical fistula

29 3.Congenital umbilical hernia

30 4. Imperforate anus Rectum Anal pit Atresia

31 5.Congenital megacolon

32 Development of larynx, trachea and lung Primitive pharynx 4th week Longitudinal depression Laryngotracheal groove

33 Laryngotracheal divertuculum Right lung bud Left lung bud Tracheoesophageal septum Laryngotracheal groove

34 End of 4th week: lung buds Left lung bud→ 2 branches 5th week: Right lung bud→ 3 branches Left lung bud→ 8-9 branches End of 2nd month: Right lung bud→ 10 branches End of 6th month: bronchia branch to alveoli 7th month: surfactant

35 Pulmonary alveoli Stroma Mesenchyme Lung bud Lengthen Bronchia and their branches

36 Abnormality of respiratory system Tracheoesophageal fistula


Download ppt "Development of digestive system and respiratory system 1.Primitive gut 2.Development of primary pharynx 3.Development of esophagus and stomach 4.Intestinal."

Similar presentations


Ads by Google