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GI > Development Of Gut (2) > Flashcards

Development Of Gut (2) Flashcards

1
Q

What is the name of the membrane that seals the gut tube at the mouth end?

A

Buccopharyngeal membrane

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2
Q

What is the name of the membrane that seals the gut tube at the tail end/near the future anus?

A

Cloacal membrane

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3
Q

What week of development does the buccopharyngeal membrane rupture to form the mouth?

A

4th week of development

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4
Q

What week of development does the cloacal membrane rupture to form the anus?

A

7th week

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5
Q

What is the structure that connects the midgut and the yolk sac?

A

Vitelline duct

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6
Q

What branch of the aorta supplies the foregut?

A

Coeliac artery

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7
Q

What branch of the aorta supplies the midgut?

A

Superior mesenteric artery

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8
Q

What branch of the aorta supplies the hindgut?

A

Inferior mesenteric artery

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9
Q

What organs/structures does the foregut give rise to?

A

Oesophagus
Stomach
Pancreas
Liver
Bile duct
Gallbladder
Spleen
Part of duodenum
2nd part of lower resp tract

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10
Q

What organs/structures does the midgut give rise to?

A

Duodenum
Jejunum
Ileum
Caecum
Appendix
Ascending colon
2/3 transverse colon

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11
Q

What organs/structures does the hindgut give rise to?

A

Distal 1/3 transverse colon
Descending colon
Sigmoid colon
Rectum
Upper anal canal
Cloaca

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12
Q

What does the cloaca separate into?

A

The Urogenital sinus

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13
Q

What part of the gut does the lung bud form from and when does it form?

A

Anteriorly from foregut

Forms at 4th week of development

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14
Q

What cleaves off the lung bud from the foregut?

A

Tracheoesophageal septum

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15
Q

What is the lung bud called once its been cleaved off by the tracheoesophageal septum?

A

Respiratory bud

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16
Q

What can happen if the lung bud doesnt get cleaved by the tracheoesophageal septum properly?

A

Blind-end oesophagus

Tracheoesophageal fistula

17
Q

What happens at the 5th week to the endoderm forming the gut tube?

What then happens at the 9th week?

A

Rapidly proliferates which occludes the lumen

Then recanalisation occurs reopening the lumen

18
Q

What happens t the stomach during development?

A

Dilation on dorsal aspect then rotates
The foregut then rotates the 90 degrees forming the shape of the stomach

19
Q

What mesentrys does the foregut have?

A

Ventral mesentry + Dorsal mesentry

20
Q

What mesentries does the midgut and hindgut have, how is this different to the foregut?

A

Dorsal mesentry

Foregut has both ventral and dorsal mesentry where’s the mid and hindgut only have a dorsal mesentry

21
Q

What mesentry does the liver develop in?

A

Ventral mesentry of foregut

22
Q

What mesentry does the spleen develop in?

A

Dorsal mesentry of foregut

23
Q

What double layer of peritoneum forms the mesentries?

A

Visceral peritoneum

24
Q

When does parietal peritoneum become visceral peritoneum?

A

When parietal peritoneum comes away from abdominal wall

25
Q

Which peritoneal membrane can you localise pain too and which one has vague pain?

A

Localise pain = somatic mesoderm

Vague pain = splanchnic mesoderm,

26
Q

What are the 2 major peritoneal cavities formed by the rotataion of the foregut/folding and displacement of peritoneal layers?

A

Greater sac

Lesser sac

27
Q

What is the greater sac?

A

Th larger sac of the peritoneal cavity occupying the most space

28
Q

Where is the lesser sac?

How does it connect to the greater sac?

A

Cavity behind stomach

Foramen of Winslow

29
Q

How do the left and right vagal nerve fibres move as the gut tube rotates 90 degrees clockwise?

A

Right vagal fibres become the posterior vagal trunk
Left vagal fibres become the anterior vagal trunk

30
Q

What is the falciform ligament?

Where does it originate from?

A

Peritoneal ligament from anterior wall of abdomen to the liver

Originates from ventral mesentry of the foregut

31
Q

What is the lesser omentum peritoneal ligament?

A

Joins the liver to the stomach

32
Q

What is the gastrosplenic ligament?

A

Connects stomach to spleen

33
Q

What is the Spleno-renal ligament?

A

Connection between spleen and posterior abdominal wall
And
Hilum of spleen with the LEFT kidney

GI (35 decks)

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