檢視大网膜的原始碼

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| style="background: #008080" align= center|  '''<big>大网膜</big> '''

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[[File:U=1514244442,593954256&fm=26&gp=0.jpg|缩略图|居中|[https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1606971059992&di=738efd41e3e11a316702258630c3a7b1&imgtype=0&src=http%3A%2F%2Fpic.baike.soso.com%2Fugc%2Fbaikepic2%2F10298%2F20160729144903-137278257.jpg%2F800 原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%A4%A7%E7%BD%91%E8%86%9C&step_word=&hs=0&pn=1&spn=0&di=1430&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=1514244442%2C593954256&os=3434261736%2C2119745892&simid=3213037495%2C3878057581&adpicid=0&lpn=0&ln=1532&fr=&fmq=1606960969443_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fpic.baike.soso.com%2Fugc%2Fbaikepic2%2F10298%2F20160729144903-137278257.jpg%2F800&fromurl=ippr_z2C%24qAzdH3FAzdH3Fkwthj_z%26e3Bf5257_z%26e3Bv54AzdH3Fsj44wAzdH3FSi5oIggj6Ltgh_z%26e3Bip4%3Fptpsj%3D%25Ec%25A9%25A0%25E0%25BD%25l8%25Eb%25bm%25lC&gsm=2&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 来自 搜狗 的图片]]]
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网膜是指连于胃的腹膜结构，[[大网膜]]是其中一部分。它呈裙状遮蔽在小肠、[[结肠]]等腹腔脏器前方，上缘附着于胃大弯，覆盖胃前、后壁的腹膜自胃大弯和十二指肠起始部下延，形成大网膜的前二层，约至脐以下平面即折向上成为后二层，上达横结肠，包绕横结肠后与横结肠系膜相续连。成人大网膜的这四层腹膜常已愈合在一起。由胃大弯下延的两层腹膜，特别是右半侧常与横结肠愈着，这时称之为胃结肠韧带。大网膜常呈筛状，含有[[脂肪]]及吞噬细胞，具有重要的防御功能。小儿的大网膜较短，故当下腹部器官发生炎症尤其是穿孔时，易形成[[弥漫]]性腹膜炎。