embryology of GI Flashcards
Define gastrulation
Describe the principles of normal development of the foregut, midgut and hindgut
State how abnormal development can result in diseases of the alimentary tract
what closes the gut tube at either end
Gut tube is closed at its cranial end by the oropharyngeal membrane and at the caudal end by the cloacal membrane
where does oesophagus develop from
cranial part of gut tube
where do lung buds develop from
ventral wall of foregut
how does stomach develop
foregut caudal to oesophagus
what attaches stomach to dorsal and ventral wall
Mesogastrium
where does duodenum develop from
Formed from the caudal part of the foregut and the cranial part of the midgut tube
what happens if lung buds don’t separate properly
oesophageal atresia and tracheo-oesophageal fistula
where does midgut extend from
opening of bile duct to proximal 2/3rds of transverse colon
development abnormalities of midgut
stenosis or malrotation
what is Omphalocele
Failure of retraction of herniated intestinal loop through umbilical ring at week-10
development of hindgut
urorectal fistula, Rectovaginal fistula
