How does the fetus not drown?

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Offline lunar11

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How does the fetus not drown?
« on: 10/01/2010 14:25:08 »
I know that the amniotic fluid in the womb protects the fetus from nock/bumps, but why is it that if the fetus opens it's mouth then the fluid will not fill the lungs causing it to drown.
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Offline glovesforfoxes

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How does the fetus not drown?
« Reply #1 on: 10/01/2010 17:08:59 »
A fetus doesn't need to breathe in the womb. It won't be a problem even if the esophagus & trachea are filled with liquid because the stomach & lungs are not necessary for the fetus' survival - it has it's mother's blood supply providing both oxygen & nutrients. Of course, once we're out of the womb, we're reliant on our own organs to provide these functions for us. I would guess that the baby gets rid of the amniotic fluid in it's esophagus by peristalsis (kind of like how you vomit), but I'm not sure how it would out of the trachea. Maybe it can cough? I'm sure someone else will be able to answer that question in greater detail.
The animals of the world exist for their own reasons. They were not made for humans any more than blacks were made for whites, or women for men. - Alice Walker

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Offline EatsRainbows

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How does the fetus not drown?
« Reply #2 on: 10/01/2010 20:20:42 »

And, as I understand it, newborns often begin breathing naturally
I think the screaming at birth has something to do with preparing the lungs, it helps them expand  or something, ready to be used.
"Suppose there's a significant proportion of people who are born because their parents were incompetent at using contraception. If there’s a genetic tendency to be incompetent or fumble at the crucial moment, then there would be, by definition, natural selection in favor of contraceptive ineptitude"

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Online yor_on

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How does the fetus not drown?
« Reply #3 on: 14/01/2010 18:13:29 »
Yep Rainbow, that's my understanding too.
"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."

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Offline Geezer

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How does the fetus not drown?
« Reply #4 on: 14/01/2010 18:29:39 »
I was having lunch in a diner one day and I could not help overhearing the conversation between two ladies in the next booth.

One of the ladies had seen a program on TV the night before about mothers giving birth while they were immersed in water. She was telling her friend about how wonderful it was.

"But how does the baby manage to breathe under water? Why does it not drown?" asked her friend.

She replied, "Oh, the baby is fine. It breathes through its biblical cord."

Fortunately, my mouth was not full of soup at that instant.

There ain'ta no sanity clause, and there ain'ta no centrifugal force ćther.

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Online yor_on

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How does the fetus not drown?
« Reply #5 on: 14/01/2010 21:14:28 »
It was religious experience then?
"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."