卵らん円えん孔こう

noun

foramen ovale; oval opening in the fetal heart

Anatomical term for the opening between the atria in the fetal heart, which normally closes after birth.

• 胎たい児じの心しん臓ぞうでは、卵らん円えん孔こうを通つうじて血けつ液えきが右う心しん房ぼうから左さ心しん房ぼうへ流ながれる。

  In the fetal heart, blood flows from the right atrium to the left atrium through the foramen ovale.