The human heart is really a pump, a powerful muscle the size of your fist that circulates blood to and from the body's millions of cells.
(The human heart; is really; a pump, a powerful muscle the size of your fist that circulates blood to and from the body's millions of cells) (a pump; circulates; blood)
The human heart a pump
is really circulates
a pump, a powerful muscle the size of your fist that circulates blood to and from the body's millions of cells
blood