The AV node sends out an electrical impulse that causes the heart to contract.
If you mean what percentage of you blood does your heart pump... all of it.
In heart has a four valve the two valve is pump the up and the others valve pump the blood down. heart is pump the blood
Because a heart pumps blood just like a pump would pump water.
The Heart!
The heart is a pump whose role is to pump blood around the body.
The heart is a four chambered pump, whose sole task is to pump blood round the body.
it would have to pump blood
the heart is a pump and a muscle
When you are exercising, you are breathing in oxygen (O2) and it is get the heart to pump more blood to your body
The Heart.
Your heart's job is to pump blood.
The heart is a muscle.