5-A Gut Rotation

Question 1

Adult gut derived from embryonic forgut and its blood supply?

Answer 1

stomach, part of the duodenum, liver, gall bladder and pancreas; supplied by celiac artery

Question 2

Adult gut derived from embryonic midgut and blood supply

Answer 2

part duodenum, jejunum, ileum, cecum and ascending transverse colon; superior mesnteric artery

Question 3

Adult gut derived from embryonic hind gut and its blood supply

Answer 3

descending and sigmoid colons, rectum; supplied by the inferior mesenteric artery

Question 4

Name the two peritoneal deriviatives from the lateral plate mesoderm.

Answer 4

parietal and visceral peritoneum

Question 5

What are messentary made of? (hint double layer)

Answer 5

double layer of visceral peritoneum

Question 6

Liver is encased in which mesentary?

Answer 6

ventral mesentery as it leaves the anterior body wall and goes toward the stomach

Question 7

What does retroperitoneal mean? (describes what position)

Answer 7

posterior to the peritoneal cavity

Question 8

Describe thr rotation of the stomach that results in its adult appearance.

Answer 8

Rotates 90 deg. Clockwise when viewed from above (left side becomes ventral and right side becomes ventral)

Question 9

Ventral mesogstrium becomes ___ ___

Answer 9

lesser omentum (between the stomach and liver)

Question 10

Dorsal mesogastrium becomes ____ ____

Answer 10

greater omentum (between the stomach and the spleen)ƒ. Which overlies the small intestine

Question 11

Is the spleen developed from an outgrowth of the gut tube?

Answer 11

No

Question 12

Name the two ligaments that compose the lesser omentum

Answer 12

hepatogastric ligament and hepatoduodenal ligament

Question 13

Name the ligament that is contiguous with the greater omentum

Answer 13

gastrosplenic ligament

Question 14

Name the ligament that connects the spleen to the posterior body wall over the kidney.

Answer 14

leinorenal ligament

Question 15

Describe the location and purpose of the falciform ligament.

Answer 15

connects the liver to the ventral body wall, is a deriviative of the ventral mesogastrium/ ventral mesentary

Question 16

Describe the position of the lesser sac

Answer 16

space between the stomach/lesser omentum and the posterior body wall

Question 17

Where can the epiploic foramen be found?

Answer 17

foramen accesse the lesser sac, accessed by an opening behind the edge of the lessser omentum (hepatoduodenal ligament)

Question 18

True or false the pancreas develops from a growth from the foregut?

Answer 18

false, it originates as two out growths from the foregut, differential growth beings these developing bud together

Question 19

The liver, gall bladder and the pancreas share a duct that opens into the

Answer 19

duodenum

Question 20

Generally describe the growth and rotation of the midgut.

Answer 20

the midgut elongates and protrudes into the umbilicus and rotates 270 degrees

Question 21

What is the axis of rotation for the midgut rotation?

Answer 21

about the superior mesenteric artery

Question 22

During midgut rotation what part of the gut does the cranial and caudal limb form?

Answer 22

cranial limb (small intestine, duodenum through ileum) caudal limb (ascending through transverse colon)

Question 23

Describe the relative position of the dudenum and transverse colon in the adult

Answer 23

duodenum is posterior to the transverse colon

Question 24

Describe the pancreas in relation to the stomach in the adult/

Answer 24

pancreas is posterior to the stomach

Question 25

Define periotonealized

Answer 25

organs that maintain their mesenteries (jejunum ie.)

Question 26

Define secondarily retroperitoneal

Answer 26

organs that are pressed against the posterior body wall and lose their mesenteries (ie. Duodenum, pancrease, ascending and descending colon, rectum

Question 27

Define primarily retroperitoneal

Answer 27

organs that begin and stay behind the peritoneum ie. Urogenital organs

Question 28

Name the mesentary that is retained by the jejunum and ileum, which contains elaborate set of vessels as well as innervation

Answer 28

mesointestine or mesentery proper

Question 29

Name the mesentaries that barely remain with the transverse and sigmoid colons (remain peritonealized)

Answer 29

transverse mesocolon and sigmoid mesocolon