embryology of the gastrointestinal system pages 242 to 250 Flashcards Preview

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Flashcards in embryology of the gastrointestinal system pages 242 to 250 Deck (38):
1

How is the primitive gut tube divided in regions ?

* foregut

* Midgut

* Hindgut

2

The foregut receives blood from which artery ?

The celiac artery

3

The hindgut receives artery from the superior mesenteric artery
TRUE OR FALSE

False
The hind gut receives blood from the inferior mesenteric artery

4

The midgut receives blood from which artery ?

From the superior mesenteric artery

5

The epithelia lining the gut tube is derived from which germinative layer ?

Endoderm

6

The foregut parasympathetic innervation comes from ?

The vagus

7

The parasympathetic innervation of the midgut comes from ?

The vagus

8

The parasympathetic innervation of the hindgut comes from ?

The pelvic splanchnic nerves

9

Sympathetic innervation of the foregut distribution ?

Preganglionics : T. splanchnic nerves T5-T9
Postganglionic: celiac ganglion

10

Sympathetic innervation of the midgut distribution?

Preganglionics: thoracic splanchnic nerves T9-T12
Postganglionic: Superior mesenteric ganglion

11

Hinfgut sympathetic innervation ?

Preganglionics: Lumbar splanchnic nerves L1-L2
Postganglionics: Inferior mesenteric ganglion

12

Esophagus
Stomach
1st and 2nd duodenum
Liver
Pancreas
Gallbladder
ARE DERIVED FROM WHICH PART OF THE GUT TUBE

Foregut

13

Midgut derivatives

3rd part of duodenum
Ileum
Jejunum
Appendix
cecum
Ascending colon
2/3 transverse colon

14

Hindgut derivatives are ?

3/3 transverse colon
Descending colon
sigmoid
rectum
anal canal

15

Which organs are derived from endodermal outgrowths of the gut tube?

Lower respiratory tract
Pancreas
Liver
Biliary system

16

Rotation of the foregut is in which direction ?

90 degrees clockwise in the long axis of the tube

17

What structures arise from the remnants of the ventral mesentery in the liver ?

Lesser omentum
Falciform ligament
visceral peritoneum of the liver

18

Pancreas formation takes place from ?

An ventral and a dorsal buds of endoderm evaginations, in which the ventral bud will rotate and fuse with the dorsal bud

19

The Spleen formation takes place in which mesentery ?

Dorsal mesentery

20

The spleen is derived from which germinative layer ?

Mesoderm

21

Pancreas dorsal bud appears in which mesentery ?

Dorsal mesentery

22

During foregut rotation which structures rotate to the right ?

Liver
lesser omentum
Pylorus
Duodenum

23

During the foregut rotation which structures rotate to the left ?

Spleen
PAncreas
Greater omentum

24

The remnants of the dorsal mesentery will contribute to which structures ?

Gastro-splenic ligament
Spleno renal ligament
Greater omentum

25

Retroperitoneal organs are called those which ?

Are covered partially by the parietal peritoneum

26

Peritoneal organs are called to those which are ?

Covered great part by parietal and visceral peritoneum , suspended by a mesentery and are mobile

27

The parietal layer somatic innervation is given by ?

Low intercostal nerves, iliohypogastric and ilioinguinal nerves of the lumbar plexus

28

Postnatal remnants of mesenteries are ?

Omentum
Mesocolon
Ligaments

29

why the peritoneal cavity and when is divided into two ?

When the foregut rotates the lesser omentum rotates to the right dividing the cavity in two
the lesser sac
the greater sac

30

The omental bursa is also called ?

Lesser sac

31

The greater sac is located in relationship with the stomach ?

Anteriorly

32

If the posterior wall of the stomach is perforated which space will be receving it content ?

The lesser omentum

33

The major peritoneal organs are ?

Stomach
Liver
Gallbladder
First portion of the duodenum
Tail of the pancreas
Spleen
Ileum
Jejunum
Transverse colon
Sigmoid colon
Appendix

34

SAD PUCKER is a mnemonic used to remember retroperitoneal organs which are ?
And the numbers 112 212 111 to describe primary or secondary
1 primary
2 secondary

1 S suprarenal glands
1 A Aorta/IVC
2 D duodenum (2-3 portions)

2 P Pancreas (head, neck,body)
1 U ureters
2 C colon (ascending, descending)
2 K kidneys
2 E esophagus
2 R rectum

35

Limits of the epiploic foramen ?

anterior: Hepatoduodenal ligament
Posterior: IVC
Superior: caudate lobe of the liver
Inferior: duodenum

36

Why the hepatoduodenal ligament is important ?

Portal triad
Common bile duct
Hepatic artery
Portal vein

37

Midgut rotation starts ?

6th 10 week

38

Which areas can be used to enter the lesser omentum ?

Epiploic foramen
Gastro splenic ligament