檢視中静脉的原始碼

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| style="background: #008080" align= center|  '''<big>中静脉</big> '''

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[[File:U=4226644029,4040725399&fm=26&gp=0.jpg|缩略图|居中|[https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1607316176770&di=a8e03e4af424b682afe71681f6c75073&imgtype=0&src=http%3A%2F%2Fimg.yao51.com%2Fjiankangtuku%2Fdbijhpffz.jpeg原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E4%B8%AD%E9%9D%99%E8%84%89&step_word=&hs=0&pn=0&spn=0&di=127160&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=4226644029%2C4040725399&os=3167847563%2C2651297910&simid=3067864926%2C3724624822&adpicid=0&lpn=0&ln=941&fr=&fmq=1607306087119_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%2Fimg.yao51.com%2Fjiankangtuku%2Fdbijhpffz.jpeg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Byw5c8_z%26e3Bv54AzdH3F3twghwg2p7h7AzdH3Frr4qrqy_z%26e3Bip4s&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 来自 百度 的图片]]]

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中静脉与相应的[[中动脉]]伴行，但与伴行的中动脉相比管腔大、管壁薄而软、弹性小，易于扩张。

分内、中、外三层膜，内弹力膜不明显；[[中膜]]平滑肌层数量少，仅5-10层；外膜与中膜分界不明显。