Does the heart grow when you grow?

Yes the heart grows over time as the body grows. The heart is the approximate size of your fist.

Your heart can grow to the size of your fist.

Me and my friend thinks it grows faster than a pea in a pod. love homer xx HAAAAAAAAAAA :) I know,, but it's secret && confidential.. Love Marage Simpson, x..

About to the size of a human adults fist, give or take a little sizing.

Your heart has to pump faster to send the blood in your body through a much larger form. That is all. It's like a fist sized water pump that needs to send water down a hose no longer than your arm....