A part of the peritoneum that starts at the greater curvature of the stomach, in front of the transverse colon, and hangs down deeply like an apron on the inner surface of the anterior abdominal wall. In some parts it has a mesh-like shape, hence the name. Embryologically, there are two lobes, anterior and posterior. The anterior lobe forms the posterior gastric mesentery at the greater curvature of the stomach and hangs down behind the anterior abdominal wall, while the posterior lobe then folds back and faces upward to connect with the transverse colon. Omental tumors and omental hernias can rarely occur. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
胃の大彎に始って,横行結腸の前,さらに前腹壁の内面にエプロン状に深く垂れ下がっている腹膜の一部。部位によっては網状になっているのでこの名がある。発生学的には前,後の2葉があり,前葉は胃の大彎で後胃間膜をつくって前腹壁のうしろを垂れ下がり,後葉は続いて後方へ折り返して上方に向い,横行結腸に結合している。まれに大網腫瘍や大網ヘルニアの発生をみることがある。
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