I understand that oxygen is transferred through the umbilical cord. But what takes place to suddenly flip the switch and create the need and capability to breathe air?
In: Biology
While they are still in the womb and floating in that bag of water, the lungs are still contracted and closed. The oxygen is being delivered to them from a vein/artery that is connected to the mother. Upon delivery of the baby, the doctors stimulate or “make the baby cry” which now expands their lungs and will then be the mode of acquiring oxygen. But technically there are alot of going on inside that shifts this mode.
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