i have been researching deep dives. I understand that deep-divers have the same pressure inside of their bodies as there is outside. Yet i still cannot understand how they do it. Even if they have the same pressure in their lungs and i assume their blood there is a large area that is not covered. I mean if i push down with the force of 100 kg on my finger, should it matter if i have 100 kg of pressure inside the blood in my finger? It would probably help a bit but i still don't understand why it doesn't get squeezed. Do deep divers feel a squeezing sensation? Does it become like swimming in syrup at deep depths? Honestly i don't understand how they do it with 100 kg pushing down on them... Even if the force of 100 kg is pushing inside them how come they can even move their arms??
I also have another question. I get that as you add more and more water on top of you there will be more and more pressure, well, on top of you... But say for example under the arms of a diver. Is it the exact(i guess i mean to ask if this has been tested rigourously) same pressure there? After all the shoulder is taking the pressure from above. Maybe a better example would be a closed diving-bell. The pressure below it is exactly the same as on it's sides(?) And why would this be.
And finally... As i understand it the pressure inside a closed diving bell is the same as the water pressure. But gas is easier to "move around in" -- or objects can more easily do work - to say it in scientific(:D) than when in liquids. Is this true or am i deluded?
These are my questions. I realize perhaps i should make 3 separate posts but they are all aimed at understanding the same thing and are related to eachother so i hope it will be allowed to stand.