The human heart weighs approximately 250 to 300 grams.

to me it's always been scary to think about my heart
just going about business in my chest
pumping and moving 
just under my breast
where you put your head
where I sometimes balance my tea cup
and it could beat irregularly
it could stop
it's muscular
like love

like a river
four chambers
the size of a fist
 can almost hear it
beat for you