'Through a stethoscope, you can hear this organ make a healthy "lub dub" sound'
Heart
BILL NYE THE SCIENCE GUY: Through a stethoscope, you can hear this organ make a healthy lub dub sound
Through a stethoscope, you can hear this organ make a healthy "lub dub" sound
Through a stethoscope, you can hear this organ make a healthy "lub dub" sound
BILL NYE THE SCIENCE GUY
Heart
BILL NYE THE SCIENCE GUY