'You can't beat its pulmonary valve, opening & closing over 60 times a minute'
Heart
MY BOD: You cant beat its pulmonary valve, opening & closing over 60 times a minute
You can't beat its pulmonary valve, opening & closing over 60 times a minute
You can't beat its pulmonary valve, opening & closing over 60 times a minute
MY BOD
Heart
MY BOD