ELI5, if you get an injury underwater (say in the ocean) that opens the skin and bleeds, what stops your body from intaking water?

Question

ELI5, if you get an injury underwater (say in the ocean) that opens the skin and bleeds, what stops your body from intaking water?

In: 1476

Answer 1

the circulatory system is pressurized in a sense. this is whole deal with ” blood pressure”

so to some extent the internal* pressure of the system would keep the water out up to ap oint where external pressure exceeds internal* one, or if blood loss is severe enough that blood pressure drops.