Hole in the heart babies, or Foetal adaptations of the heart

There are some structures in the heart that are remnants of adaptations to the circulation through it that we used when we were foetuses to avoid sending blood to the lungs. Let's have a look at those and talk about what "hole in the heart babies" really means.
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Видео Hole in the heart babies, or Foetal adaptations of the heart канала Sam Webster