5-A Gut Rotation Flashcards
Adult gut derived from embryonic forgut and its blood supply?
stomach, part of the duodenum, liver, gall bladder and pancreas; supplied by celiac artery
Adult gut derived from embryonic midgut and blood supply
part duodenum, jejunum, ileum, cecum and ascending transverse colon; superior mesnteric artery
Adult gut derived from embryonic hind gut and its blood supply
descending and sigmoid colons, rectum; supplied by the inferior mesenteric artery
Name the two peritoneal deriviatives from the lateral plate mesoderm.
parietal and visceral peritoneum
What are messentary made of? (hint double layer)
double layer of visceral peritoneum
Liver is encased in which mesentary?
ventral mesentery as it leaves the anterior body wall and goes toward the stomach
What does retroperitoneal mean? (describes what position)
posterior to the peritoneal cavity
Describe thr rotation of the stomach that results in its adult appearance.
Rotates 90 deg. Clockwise when viewed from above (left side becomes ventral and right side becomes ventral)
Ventral mesogstrium becomes ___ ___
lesser omentum (between the stomach and liver)
Dorsal mesogastrium becomes ____ ____
greater omentum (between the stomach and the spleen)ƒ. Which overlies the small intestine
Is the spleen developed from an outgrowth of the gut tube?
No
Name the two ligaments that compose the lesser omentum
hepatogastric ligament and hepatoduodenal ligament
Name the ligament that is contiguous with the greater omentum
gastrosplenic ligament
Name the ligament that connects the spleen to the posterior body wall over the kidney.
leinorenal ligament
Describe the location and purpose of the falciform ligament.
connects the liver to the ventral body wall, is a deriviative of the ventral mesogastrium/ ventral mesentary
Describe the position of the lesser sac
space between the stomach/lesser omentum and the posterior body wall
Where can the epiploic foramen be found?
foramen accesse the lesser sac, accessed by an opening behind the edge of the lessser omentum (hepatoduodenal ligament)
True or false the pancreas develops from a growth from the foregut?
false, it originates as two out growths from the foregut, differential growth beings these developing bud together
The liver, gall bladder and the pancreas share a duct that opens into the
duodenum
Generally describe the growth and rotation of the midgut.
the midgut elongates and protrudes into the umbilicus and rotates 270 degrees
What is the axis of rotation for the midgut rotation?
about the superior mesenteric artery
During midgut rotation what part of the gut does the cranial and caudal limb form?
cranial limb (small intestine, duodenum through ileum) caudal limb (ascending through transverse colon)
Describe the relative position of the dudenum and transverse colon in the adult
duodenum is posterior to the transverse colon
Describe the pancreas in relation to the stomach in the adult/
pancreas is posterior to the stomach
Define periotonealized
organs that maintain their mesenteries (jejunum ie.)
Define secondarily retroperitoneal
organs that are pressed against the posterior body wall and lose their mesenteries (ie. Duodenum, pancrease, ascending and descending colon, rectum
Define primarily retroperitoneal
organs that begin and stay behind the peritoneum ie. Urogenital organs
Name the mesentary that is retained by the jejunum and ileum, which contains elaborate set of vessels as well as innervation
mesointestine or mesentery proper
Name the mesentaries that barely remain with the transverse and sigmoid colons (remain peritonealized)
transverse mesocolon and sigmoid mesocolon
