BIOL 2P95 Lecture Notes - Ureter, Hepatoduodenal Ligament, Pericardium

• School: Brock University
• Department: Biological Sciences
• Course: BIOL 2P95
• Professor: Dirk De Clercq

Document Summary

Foregut: stomach to bile duct in duodenum plus associated organs; celiac. Midgut: duodenum to transverse colon; superior mesenteric artery. Hindgut: transverse colon to rectum; inferior mesenteric artery. Gut tube derives from folding of endoderm, continuous with yolk sac: mesentery. Def mesentery: opposing layers of visceral mesothelium (sim. squa. Gut tube suspended in peritoneal cavity by dorsal and ventral mesenteries, but later ventral mesentery breaks down. Examples of mesenteries: pleura (lungs), pericardium (heart), peritoneum (gut) However, all -colic ligaments are adhesions (see below) The broad ligament of the uterus is a true mesentery of the pelvis. Greater omentum (func. includes sealing off infection and inflammation) Lesser sac (potential space is omental bursa) Epiploic foramen (aka omental foramen, foramen of winslow) Splenorenal ligament (spleen posterior abdominal wall near left kidney) Falciform ligament (ventral liver anterior abdominal wall) Development explains dorsal versus ventral mesentery structures. The spleen is a dorsal structure, hence spleno-/-splenic ligaments are.