Intraperitoneal Structures Transverse mesocolor Mesentery of stomach,superior part of duodenum,jejunum,ileum, the small Sigmoid cecum,appendix,transverse intestine mesocolon and sigmoid colon,spleen ovary(mesovarium)andTransverse mesocolon Mesentery of the small intestine Sigmoid mesocolon Intraperitoneal Structures stomach, superior part of duodenum, jejunum, ileum, cecum, appendix, transverse and sigmoid colon, spleen ， ovary(mesovarium) and uterine tube (mesosalpinx)