NME 2.9

Question 1

where does liver originate from?

Answer 1

• endodermal epithelium

Question 2

when does liver originate?

Answer 2

• 3 to 4 weeks

Question 3

cranial part or caudal part form liver?

Answer 3

• cranial part

Question 4

cranial part or caudal part form gallbladder?

Answer 4

• caudal part

Question 5

what deos liver grow into?

Answer 5

• septum transversum

Question 6

what does the septum transversum form?

Answer 6

• ventral meogastrium

Question 7

when does pancreas development occur?

Answer 7

• 5 weeks

Question 8

what happens during rotation of duodenum?

Answer 8

• the right ventral bud moves dorsally aroudn duodenum

- ventral bud not close contact with and below dorsal bud

Question 9

what does ventral bud form?

Answer 9

• ucinate process

Question 10

what does dorsal bud forms?

Answer 10

• superior part of the head, neck, body and tail

Question 11

what is duct of wirsung?

Answer 11

• main pancreatic duct

- formed from distal dorsal pancreatic duct and entire ventral duct

Question 12

what is teh duct of santorini?

Answer 12

• accessory pancreatic duct

- form from proximal dorsal duct

Question 13

what happens to the duodenum on 2nd month?

Answer 13

• recanalization of lumen

Question 14

what forms the striated muscle in upper oesophagus?

Answer 14

• pharyngeal arches

Question 15

what forms the smooth muscle in lower oesophagus?

Answer 15

• surrounding mesenchyme

Question 16

what helps separates trachea and oesophagus?

Answer 16

• tracheoesophageal septum

Question 17

what is recanalization?

Answer 17

• lumen is widen so flow can be restored

Question 18

what are the common abnormalities of oesophagus?

Answer 18

• oesophageal stenosis
• oesophageal artersia
• polyhydraminos

Question 19

what causes polyhydramnios

Answer 19

• fetus with artersia unable to swallow amniotic fluid

- excess amniotic fluid

Question 20

what causes hypertrophic pyloric stenosis?

Answer 20

• caused by the abnormal thickening of muscles of pylorus

Question 21

what causes stenosis?

Answer 21

• insufficiently recanalization

Question 22

what causes artersia?

Answer 22

• complete lack of recanalization

Question 23

what are the biliary tree abnormalities?

Answer 23

• accessory hepatic ducts

- extrahepatic biliary artersia

Question 24

what is annular pancreas?

Answer 24

• when the ventral bud split and forms a ring around the duodenum
• failure of fusion of dorsal and ventral ducts so dorsal duct become main duct