'While systole refers to the tightening of the heart, this is the period between contractions'
diastole
IN YOUR HEARTS: While systole refers to the tightening of the heart, this is the period between contractions
While systole refers to the tightening of the heart, this is the period between contractions
While systole refers to the tightening of the heart, this is the period between contractions
IN YOUR HEARTS
diastole
IN YOUR HEARTS