檢視腹前外侧壁的原始碼

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| style="background: #008080" align= center|  '''<big>腹前外侧壁</big> '''

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[[File:U=2057526093,1024327201&fm=26&gp=0.jpg|缩略图|居中|[https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1604571249678&di=fa3c1387fa663e21d3268234902875b4&imgtype=0&src=http%3A%2F%2Fcache.tianyawww.zysj.com.cn%2Fimage%2Flilunshuji%2Frentijiepouxue%2Frentijiepouxue313.jpg原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E8%85%B9%E5%89%8D%E5%A4%96%E4%BE%A7%E5%A3%81&step_word=&hs=0&pn=2&spn=0&di=660&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=2057526093%2C1024327201&os=3201725258%2C1125332329&simid=3561160616%2C402704859&adpicid=0&lpn=0&ln=345&fr=&fmq=1604561134449_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%2Fcache.tianyawww.zysj.com.cn%2Fimage%2Flilunshuji%2Frentijiepouxue%2Frentijiepouxue313.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fvwvij_z%26e3Bptwgywooo_z%26e3Bzyf3_z%26e3Bv54_z%26e3BvgAzdH3Fsts7gfi73tAzdH3F6jgpt3tjr57x7jAzdH3Fl0a-8a-8_z%26e3Bip4s&gsm=3&rpstart=0&rpnum=0&islist=&querylist=&force=undefined来自 百度 的图片]]]

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由腹前正中线两侧的[[腹直肌]]和其外侧的三层扁肌组成腹直肌位于白线两侧，其前、后面均被腹直肌鞘所包裹，腹直肌有3～4个腱划与腹直肌鞘的前层密切愈着，剥离困难。腱划内常有血管，经腹直肌切口分开膀亘肌纤维时，腱划处应注意止血。腹直肌鞘分为前、后两层，两层纤维在腹直肌外缘融合处，形成一半月型凸向外侧的弧形，称半月线。

腹直肌鞘前层由[[腹外斜肌腱膜]]和腹内斜肌腱膜的前层组成，后层由腹内斜肌腱膜的 后层及[[腹横肌]]腹膜组成。但在脐下4～5cm以下三层扁肌的腱膜均参与构成腹直肌鞘前层，鞘后层缺如，形成一弓状游离缘，称弓状线。