After this lecture you will be able to:Afterthis lecture you will be able to: Accurately define and label thoracic lymph nodes to conform to the new. IASLC lymph node map. Recognize the differences between the new IASLC lymph node map and. old MDoldMD-ATS lymph node mapATSlymph node map.
The mesentery is a fold of membranous tissue that arises from the posterior wall of the peritoneal cavity and attaches to the intestinal tract.Within it are the arteries and veins that supply the intestine.uring mobilization of the small intestinal mesentery from the posterior abdominal wall, this fold is incised, allowing access to the interface between the small intestinal mesentery and the retroperitoneum.
1 The term mesentery is often used to refer to a double layer of visceral peritoneum. 2  There are often blood vessels, nerves, and other structures between these layers. 3  The space between these two layers is technically outside of the peritoneal sac, and thus not in the peritoneal cavity.lthough they ultimately form one continuous sheet, two types or layers of peritoneum and a potential space between them are referenced: 1  The outer layer, called the parietal peritoneum, is attached to the abdominal wall and the pelvic walls.