Liquid flows in three
directions only. The one, from upper level to lower level,
the second from higher pressure to lower pressure and the
third from a more diluted to a concentrated solution through
semi-permeable membrane.
In case of bleeding the blood is
coming out of the body because it is at higher pressure
within the body than the atmospheric pressure. The blood
pressure is the pressure of blood, within the body,
exceeding the atmospheric pressure and is due to pumping of
blood by the heart. Also, the bleeding will be excessive if
the effected part is brought lowest from rest of the body.
If BLEEDING CAN BE STOPPED BY
APPLYING PRESSURE,
SURGERY CAN
BE PERFORMED UNDER PRESSURE
If any part of the body is cut
opened in a space having pressure just equal to the sum of
atmospheric pressure and blood pressure of that part of the
body, while keeping rest of the body in atmospheric pressure
with opened part upward, there will be no bleeding from the
exposed portion.