it pumps blood to it to rechrive it and pump it through the body
What happens is there is a part of your brain that does a few things atomaticaly. For example it tells you to breathe the whole time, rather than you having to think about it. It does the same with your heart.
you breathe in and out
organs and heart
you would choke and find it hard to breathe.
Because if you have a heart defect then it makes you get out of breathe faster and if you have a hole in your heart wall it also makes you get out of breathe faster.
the lungs will moves down when breathe out air
they expand
It expands
It expands
you dont die!!
if you dont breath then you die
up and downwnwn