7: Embryology Flashcards Preview

Gastrointestinal Week 3 2016/17 > 7: Embryology > Flashcards

Flashcards in 7: Embryology Deck (23):
1

What is the communication from the midgut to the yolk sac during development?

Vitelline duct

2

Which germ layer does the epithelium, ducts and glands come from?

Endoderm

All GI stuff comes from the endoderm

3

Which germ layer does the lamina propria, smooth muscle and connective tissue come from?

VISCERAL mesoderm

4

During development, mesenteries form on the ventral and dorsal aspects of the gut. As organs become retroperitoneal, most of these mesenteries are lost.

What is an example of a ventral mesentery?

Falciform ligament

Lesser omentum

5

During development, mesenteries form on the ventral and dorsal aspects of the gut. As organs become retroperitoneal, most of these mesenteries are lost.

What is an example of a dorsal mesentery?

Dorsal mesogastrium

Dorsal mesoduodenum

Dorsal mesocolon

6

In Week 4, the (cranial / caudal) end of the oesophagus dilates to form which shapes of the stomach?

caudal

Greater and lesser curvatures

7

After its caudal dilation, in which direction does the gut tube project to form the stomach?

Dorsally (posteriorly)

8

By how many degrees does the gut tube rotate to form the stomach?

90º

9

Which structures, associated with the stomach, form after the rotation is complete?

Greater and lesser sacs

Greater and lesser omenta

Falciform ligament

10

Where in the duodenum does the foregut stop and the midgut begin?

Between the 2nd and 3rd parts

11

What is the septum transversum?

Developmental structure which gives rise to the diaphragm and ventral mesentery (lesser omentum, falciform ligament)

Derived from the mesoderm

12

The liver buds off the gut tube during development. Into which structure does it bud?

Septum transversum

13

Which organ buds off the endoderm of the gut tube into the mesoderm of the septum transversum?

Liver

14

Which germ layer forms the lining of the biliary tree?

Endoderm

15

During development, the pancreas has ___ buds.

two

16

At the beginning of its development, the pancreas buds off the gut tube in two places. What are these two buds called?

Ventral pancreatic bud

Dorsal pancreatic bud

17

The ventral pancreatic bud rotates ___ around the dorsal aspect of the gut tube and then ___ with the dorsal pancreatic bud.

180º

fuses

18

What is the embryological structure which eventually becomes the gall bladder?

Cystic diverticulum

19

During development, the pancreas moves from ___ to ___.

(retroperitoneal / intraperitoneal)

intraperitoneal to retroperitoneal

20

Does the spleen bud from the gut tube?

No

21

Which germ layer does the spleen come from?

Mesoderm

because it's related to the VASCULAR system

22

During the majority of its development, the intestines are (inside / outside) the embryo.

outside

23

Main congenital GI tract defects to know:

Vitelline duct problems - Meckel's diverticulum, cysts, ligaments and fistulae

Fistulae or blind ends elsewhere - urorectal, anal pits etc.