Why is that when we dive under water the water doesn’t automatically fill openings. How come the water pressure doesn’t like push our eyes in if not wearing goggles or rush into your nose completely or even our other hole down there. How come the water pressure doesn’t push the water into that hole ?
I’m sure our body has some inner pressure pushing outward but how is that enough to stop the water ?
In: Biology
For your back passage, it’s not patently open normally, it’s squeezed shut, otherwise intestinal contents would leak 24/7.
For top holes like your nose, it doesn’t normally occur when u dive because of the angle and direction you enter the water protects your nostrils from being pushed up your nostrils. In contrast if you jump in the water feet first like a pin drop and don’t block your nose, the water will rush up your nose coz of the different angle. Similarly you can swim face down in the water fine without water entering the nostrils but if u try do a somersault in the water without blowing bubbles through your nose and you’ll get that god awful feeling of water going up your nose
And for your eyeballs, they sit pretty snug in there socket and it’s blind ended so there is no where for them to be squished, and they’re filled with fluid, so the pressure of water at the surface is equal and doesn’t impact the eyeballs… obviously at extreme depths, this pressure can crush the eyeballs, but at those depths, eye ball crushing would be the least of your concerns
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