试题与答案

关于胎儿循环系统特点,正确的是() A.有脐静脉2条,脐动脉1条 B.卵圆孔位于左、

题型:单项选择题 A1/A2型题

题目:

关于胎儿循环系统特点,正确的是()

A.有脐静脉2条,脐动脉1条

B.卵圆孔位于左、右心室之间

C.进入胎儿右心房的下腔静脉血是混合血

D.卵圆孔开口处位于上腔静脉入口

E.胎儿体内存在纯动脉血

答案:

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