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PHASE ONE > GI Embryology > Flashcards

GI Embryology Flashcards

1
Q

Foregut starts from the … to the …

A

mouth

common bile duct

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2
Q

Midgut starts from the … to the …

A

common bile ducts

2/3rds of transverse colon

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3
Q

Hindgut starts from … to the …

A

2/3rds of the transverse colon

anal canal

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4
Q

Blood supply of foregut

A

Coeliac artery

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5
Q

Components of foregut

A

Pharynx
Oesophagus
Stomach
Proximal half of duodenum and the derivative (liver, biliary apparatus, pancreas)

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6
Q

Blood supply of midgut

A

Superior mesenteric artery

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7
Q

Components of midgut

A 
Distal half of duodenum 
Jejenum
Ileum
Caecum
Appendix
Ascending colon
Right 2/3rds of transverse colon
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8
Q

Blood supply of hindgut

A

Inferior mesenteric artery

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9
Q

Components of hindgut

A 
Left 1/3 of transverse colon
Descending colon
Sigmoid colon
Rectum
Anal canal
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10
Q

Embryonic folding

A

4th week - Embryonic folding: from flat, trilamminar disc into a cylinder

Folding occurs in horizontal and medial planes simultaneously

Folding in HORIZONTAL PLANE = two lateral body folds

Folding in MEDIAL PLANE = cranial and caudal folds

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11
Q

What is responsible for development of GI tract?

A

Endoderm

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12
Q

As embryonic folding continues, the endoderm …

A

moves towards the midline and fuses - incorporating the dorsal part of the yolk sac to form the primitive gut tube

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13
Q

The primitive gut tube is formed from

A

the endoderm

Visceral mesoderm

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14
Q

Endoderm gives rise to

A
  1. Epithelial lining of digestive tract
  2. Hepatocytes of the liver
  3. Endocrine and exocrine cells of the pancreas
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15
Q

Visceral mesoderm gives rise to

A
  1. Muscle, connective tissue and peritoneal components of the wall of the gut
  2. Connective tissue for the glands
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16
Q

The primitive gut tube differentiates into …

A

foregut midgut hindgut

17
Q

Pharyngeal arches are part of … and extend from … to the …

A

foregut

oropharyngeal membrane to the respiratory diverticulum

18
Q

Which weeks do pharyngeal arches develop

A

4th and 5th

19
Q

How many pharyngeal arches

A

1, 2, 3, 4 and 6

NO FIVE

PHASE ONE (19 decks)

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