純自動改變結果電子牌靴l:13710079688" src="//inews.gtimg.com/newsapp_bt/0/13416677906/1000">脐带横断面示意图. 展示了脐动脉（Umbilical arteries）、脐静脉（Umbilical vein）、脐尿管（Allantoic duct）等结构的解剖关系。图片来源：路易斯·巴里奥斯
%D6%C7%C4%DC%D2%A3%BF%D8%C5%C6%D1%A5%BA%CF%D7%F7%2D%A1%BE%40%31%33%37%31%30%30%37%39%36%38%38%A1%BF
%D6%C7%C4%DC%D2%A3%BF%D8%C5%C6%D1%A5%BA%CF%D7%F7%2D%A1%BE%40%31%33%37%31%30%30%37%39%36%38%38%A1%BF
%D6%C7%C4%DC%D2%A3%BF%D8%C5%C6%D1%A5%BA%CF%D7%F7%2D%A1%BE%40%31%33%37%31%30%30%37%39%36%38%38%A1%BF
%D6%C7%C4%DC%D2%A3%BF%D8%C5%C6%D1%A5%BA%CF%D7%F7%2D%A1%BE%40%31%33%37%31%30%30%37%39%36%38%38%A1%BF
