Assertion: sigmoid colon's mesentery | /r/HasProperty | double layers of peritoneum
Facets:
value: in the abdominal cavity
type: LOCATION
Source sentences:
text: Mesenteries are double layers of peritoneum in the abdominal cavity and are continuations of the visceral and parietal peritoneum with the serous membranes adhered back to back so that the outer mesothelium secretes serous fluid into the peritoneal cavity.