'Name given the tissue that sparks the heart into contracting; some people need an artificial one'
a pacemaker
PLACES IN THE HEART: Name given the tissue that sparks the heart into contracting; some people need an artificial one
Name given the tissue that sparks the heart into contracting; some people need an artificial one
Name given the tissue that sparks the heart into contracting; some people need an artificial one
PLACES IN THE HEART
a pacemaker
PLACES IN THE HEART