Posted by JR on August 30, 2011 at 00:10:13:
In Reply to: Abdominal Development II posted by isz on August 29, 2011 at 20:10:36:
1.What is the timetable of the embryonic period?- 0-8 weeks
2. What is the timetable of the fetal period? -3rd month-birth
3. What is omentum, mesentery, mesocolon, and ligaments?- Omentum connects stomach to abdominal wall, mesentery connects small intestine to abdominal wall, and mesocolon connects large intestine to abdominal wall
4. What is the relationship of the structures in #3 to the peritoneum? –each are formed from a double layer of parietal peritoneum
5. Is the falciform ligament composed of peritoneum?- yes, a double layer
6. Where is the fat in the greater omentum - in the peritoneal cavity or deep to the visceral peritoneum? Deep to the visceral peritoneum
7. What is Meckel's Diverticulum?- A bulge in the small intestine(distal ileum) at birth. It is a remnant of the embryonic vitaline duct which connects the yolk sac to the small intestine.
8. How do the main arteries of the aorta in the abdomen define blood supply to the Foregut, Midgut, and Hindgut?
9. When does the embryo undergo herniation of the G.I. tract?-week 5, fully recedes by week 10
10. Describe the direction of this herniation? 90 degrees CCW
11. How is the pattern of the G.I. tract in terms of disposition of organs established?-90 ccw, 180ccw=270 ccw total
12. What becomes retroperitoneal during the fetal period?- Duodenum and pancreas…kidneys develop as retroperitoneal
13. What is the ligamentum teres (round ligament)?-remnant of fetal left umbilical vein, a degenerative string of tissue in free edge of falciform ligament…connects liver to umbilicus
14. What is the vitelline duct?-a long narrow tube that joins the yolk sac to the midgut lumen of the developing embryo
15. What is the urachus?-fibrous remnant of the allantois, a canal that drains the urinary bladder of the fetus and runs with the umbilical cord. Lies between transversalis fascia and peritoneum. Forms median umbilical ligament.
16. What is the median and medial umbilical ligaments? Median umbilical ligament represents the remnant of the urachus, is covered with fold of peritoneum called median umbilical fold. Medial umbilical ligaments represent remnants of the umbilical arteries. Are covered by medial umbilical folds made of raised peritoneum
17. What is the axis for rotation of the G.I. tract during development?- the axis of rotation is the superior mesentery artery.
18. What is the transverse mesocolon and how is it formed?- a broad meso-fold of peritoneum that connects the transverse colon to the posterior abdominal wall. It is a derivative of the dorsal mesentery of the embryo.
19. What is the Epiploic Foramen of Winslow?-the passage of communication between the greater sac and the lesser sac.
20. What is the lesser peritoneal sac/omental bursa?-the cavity in the abdomen formed the lesser and greater omentum. Embryologically formed from an infolding of the greater omentum…the open end of the fold forms the foramen of winslow
21. What is the greater the peritoneal sac?-the cavity that is inside the peritoneum but outside the lesser sac.
22. What is the relationship of organs such as the stomach to transversalis fascia, peritoneum, and extraperitoneal connective tissue?-transversalis fascia coats abdominal wall. The organs are embedded in extraperitoneal connective tissue and peritoneum
23. What is the gastrolienal ligament-part of the greater omentum that connects the greater curvature of the stomach to the hilum of the spleen
The lienorenal ligament-connects the left kidney and the spleen, made of peritoneum
The phrenicocolic ligament-a fold of peritoneum continued from the left colic flexure to the thoracic diaphragm. It passes inferior to and supports the spleen
24. What is the rotation of the stomach during development?-90 degrees clockwise
simple answers...could use some elaboration/revision