#peritoneum  a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera
  supertype:  serous_membrane__serosa  a thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid
  subtype:  mesentery  a double layer of peritoneum that attaches to the back wall of the abdominal cavity and supports the small intestines
     subtype:  mesocolon  mesentery that holds the lower colon the back abdominal wall
  subtype:  omentum  a fold of peritoneum supporting the viscera
     subtype:  greater_omentum__greateromentum__gastrocolic_omentum__gastrocolicomentum__caul  part of the peritoneum attached to the stomach and to the colon and covering the intestines
     subtype:  lesser_omentum  a part of the peritoneum attached to the stomach and liver and supporting the hepatic vessels

No statement uses or specializes peritoneum; click here to add one.