I have a question that has bugged me for weeks and I hope you can shed some ligh

Question

I have a question that has bugged me for weeks and I hope you can shed some light on it. I am approaching the end of my third trimester. The baby has got itself into the right position, which is great!! Though this is were my question lies. A unborn baby's head points downwards in preparation for the birth and can be like that for many weeks. If I hung upside down for that long all my blood would be swimming around my brain and I would be a bit dead!! So how come a unborn baby is okay??? Thank you

Explanation / Answer

The foetus is much smaller than an adult and it turns out that the pressure at the bottom of any column of liquid and that could be the blood supply is higher than the pressure at the top by an amount given by rho G H. Rho is density. G is the acceleration due to gravity and H is the height. The higher the height of the liquid column, the greater the pressure at the bottom relative to the top. Now, if you assume that an adult woman is let

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