A bit more context. When the baby comes out it usually comes out head first. That means the baby’s head and face will come out before the rest of the body. But what I want to know is why when the entire head and face is out but not the body it dosent dosen’t cry but when the entire body comes out it starts crying. Sorry for weird wording, I’m not that good at explaining stuff. Also sorry if this is against the rules. It’s not my intent to be weird or anything, I’m just curious.
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When the baby is inside the womb its lungs are filled with fluid that’s oxygen rich and the umbilical cord shares oxygen and nutrients rich fluid. When the baby comes out its lungs arent used to breathing air and the lungs are very weak so screaming is one of the easiest ways to clear the lungs and get the diaphragm moving in a rhythm that allows the lungs to start getting oxygen to the bloodstream.
Fun fact: the movie the abyss where the deep sea diving scenes had the characters breathing in liquid oxygen is not complete science fiction. They were experimenting with humans breathing PFC chemicals, I dont recall the specific kind but basically an inert nontoxic fluid that can hold a high amount of dissolved gas has been shown to support the respiration process of humans. It was first experimented to sustain very early term premature born babies or people who have suffered traumatic burns that extended to the lungs. As a form of life support it kinda sucked I think it only saved 40% of a very small limited group of test subjects (who had a high chance of mortality anyways) but it was suggested that if another substance more effective could be found and they could overcome issues like collapsed lungs and infections that the tech could potentially be used for deep sea diving or space travel.
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