The following changes occur after birth excluded

  • 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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