1.) The water inside the jar represents the blood that is pumped by the
heart.
2.) The heart pump model moves water from the jar through the straws and
into the pan. The heart pumps blood out into the body through the arteries in a
similar way.
3.)
The
heart is filled with blood which is squeezed out to circulate through the whole
body.
4.) No. The blood will not be pumped out of the heart into the body because
there is an obstruction.