妇产科学_妊娠生理
题目内容

The following changes occur after birth excluded

2021-01-13

A.Elimination of the placental circulation,with interruption and eventual obliter­ation of the umbilical vessels

B.Open of the ductus venosus

C.Closure of the foramen ovale

D.Gradual constriction and eventual obliteration of the ductus arteriosus

E.Dilatation of the pulmonary vessels and establishment of the pulmonary circula­tion

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