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
The umbilical cord contains [Wharton’s jelly](https://en.m.wikipedia.org/wiki/Wharton%27s_jelly) which hardens when it cools off. Do the oxygen speed through the cord is cut off after a few minutes. It’s not instant, but you are on a timer to get the baby breathing on its own.
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