14 terms

Exam 7 GI Embryology C- Babbler

GI embryology C
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Terms in this set (...)

What are the 5 adult derivatives of the midgut?
1. Small intestines, including most of the duodenum 2. Cecum 3. Vermiform appendix 4. Ascending colon 5. Right 1/2 to 2/3 of transverse colon
During the ___ week the midgut is suspended from dorsal abdomical wall by short mesentary and communicates anteriorly with yolk sac via _____ or ______
4th week vitelline duct or yolk stalk
Rapid growth in length of the midgut forms the ______ and at its apex is the ______
intestinal loop yolk stalk
the midgut is supplied by the ______
superior mesentaric artery
Rotation of midgut is about _____ degrees total ____wise, as well as coils The ____ does not participate in coiling but does rotate _____ degrees
270 degrees counterclockwise Large intestine Rotates 90 degrees
Transposition of organs, twisting of intestine can compromise blood supply which is called ______ and may produce ______ or _____
Volvulus Atresias or stenoses
In the ____ week the loops of the midgut _____ into the umbilical cord This is called _________
6th week the loops of the midgut herniate into umbilical cord Physiological umbilical hernation
What is physiological umbilical herniation and when does it occur?
As the intestinal loop lengthens and rotates, it cannot be contained within the abdominal cavity, in part because the liver occurs much of the space due to its hematopoietic role. Therefore, in the 6th week, the loops herniate into the umbilical cord. This is termed physiological umbilical herniation *Growth of intestine is faster than growth of abdomical cavity = herniation*
At the ____ week the normal herniated intestinal loop begin to the ______. The first part is the ______ which comes to lieu on the left side. The later loops gradually settle more and more to the _____
10th week Abdominal cavity proximal jejunum right
The ____ is the last part of the gut to reenter the abdominal cavity after herniation and will ultimately settle in the lower _______ abdomen This places the ascending colon and hepatic flexure of transverse colon on the ______side During this period the distal end of the cecal bud forms the ________
cecal bud lower right Appendix right side
What is Omphalocele?
Failure of intestinal loops to return to abdominal cavity.
What is gastroschis?
Extrusion of abdominal viscera without involving umbilical cord Usually on riht of umbilicus 1/10,000 births
Failure of intestinal loops to return to abdominal cavity.
Omphalocele
Extrusion of abdominal viscera without involving umbilical cord Usually on riht of umbilicus 1/10,000 births
Gastroschisis