5 Written Questions
5 Matching Questions
- From weeks six to 10-11.
- Splanchnic mesoderm (from lateral mesoderm) gives rise to muscularis, lamina propria, submucosa, vessels, connective tissue
- At week six, midgut herniates in U-shaped "primary intestinal loop" into the cord. Loop attaches to the yolk sac via vitelline duct.
When out in the cord, gut rotates 90 degrees CCW
- Superior mesenteric artery
- Pretty much right where the anal membrane was, i.e. where the junction was between endoderm and ectoderm.
- a What supplies the midgut?
- b Embryological origin of the pectinate line?
- c During what weeks is the midgut herniated into the umbilicus?
- d How does the mesoderm contribute to the gut?
What is happening here?
What happens right afterward?
5 Multiple Choice Questions
- What does the hindgut give rise to?
- When does the midgut undergo herniation?
- What germ layer contributes to pancreatic acinar and islet tissue?
What is this?
What is the middle circle, and what does it supply?
5 True/False Questions
Endoderm-derived hepatocytes, biliary tree.
Mesoderm-derived connective tissue, hematopoietic, and Kupffer cells → How much does the gut rotate during development?
4th week, off of the caudal foregut endoderm. → When do the liver, biliary, tree, pancreas arise from the ventral buds, and off of what?
Pancreas. Produces HCO3- → What portion of the GI tract is important for neutralizing stomach acid?
Meckel's diverticulum, due to abnormal persistence of the vitelline duct (omphalomesteric duct). This can be connected to the umbilicus via a fibrous cord. → What happens if the omphalomesenteric (vitelline) duct persists?
From dorsal and ventral buds
Ventral bud moves dorsally and the two buds fuse → If the lumen of the median umbilical ligament fails to obliterate, what kind of structures can you have?