Gut development Flashcards

1
Q

What are the main weeks of gut development?

A

Weeks 4 - 8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Define Atresia

A

Blockage of a tube

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Define Stenosis

A

Narrowing of a tube

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What attaches the stomach to the body wall

A

Ventral and dorsal mesogastrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where does the liver but originate?

Ventral or dorsal mesogastrium

A

Ventral mesogastrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What structure forms the greater omentum?

A

Dorsal mesogastrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

From how many buds does the pancreas form

A

2 buds; tail and head develop separately

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

From what structures do the head and tail portions of the pancreas develop?

A

Head from ventral mesogastrium

Tail from dorsal mesogastrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Why does the left Vagus nerve sit on the anterior face of the stomach?

A

Left Vagus nerve originally runs down the left side of the stomach
It ir rotated 90* with the stomach during dilation and rotation phase of development

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

From which germ layer do the visceral organs develop

A

Mesoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

From which germ layer do the epithelia and glands of the GI develop?

A

Endoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

From which structure does the liver bud develop?

A

Ventral mesogastrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Does the main pancreatic duct originate from the head or tail bud?

A

Head of the pancreas, developed from the ventral mesogastrium, gives rise to the main pancreatic duct.
Accessory pancreatic duct from the tail portion is present in 10% population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which portion of the developing GI tract is still connected to the yolk sac via the yolk stalk?

A

Midgut

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which artery supplies the foregut?

A

Celiac Trunk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which artery supplies the midgut?

A

Superior mesenteric artery

17
Q

Which artery suplies the hindgut?

A

Inferior mesenteric artery

18
Q

What are the 2 main processes in midgut development?

A

Elongation and rotation
Such elongation that herniation occurs into the umbilical cord
Total rotation of the duodenum is approx. 270*

19
Q

Where does the foregut start and end in the embryo & adult?

A

Embryo;
Oropharyngeal membrane
Liver outgrowth

Adult;
Mouth
Bile duct, duodenum

20
Q

Where does the midgut start and end in the embryo and adult?

A

Embryo;
Liveroutgrowth
Distal 3rd of transverse colon

Adult;
Bile duct, duodenum
Distal 3rd of transverse colon

21
Q

Where does the hindgut start and end in the embryo and adult?

A

Embryo;
Distal 3rd transverse colon
Colacal membrane

Adult;
Distal 3rd transverse colon
Rectum

22
Q

What is the boundary between the endoderm and the ectoderm in the hind gut?

A

Cloacal membrane

23
Q

What separates the allantois from the hindgut in the cloaca?

A

Urorectal septum

24
Q

The urorectal septum separates the cloaca into 2 parts; ventral and dorsal.
What structures develop in each part?

A

Ventral
Urogenital sinus. Bladder and urethral parts.

Dorsal
Anal canal & rectum.

25
What is the Allantois?
Part of the hidgut protruding through the umbilical stalk
26
From what structure does the median ubillical ligament and umbilical arteries & veins develop?
Allantois
27
In which weeks do the herniated intestines return to the abdomen?
Weeks 11-12
28
What is the name for the primordial mouth?
Stomodenum
29
What is the name for the anal pit in development?
Proctodenum
30
Blood supply to the anal cannal is different for the proximal 2/3rd and the distal 3rd. What are they?
Proximal 2/3rd; inferior mesenteric artery Distal 3rd; inferior rectal arteries This part of the rectum is of ectodermal origin