'This organ has a natural pacemaker, but if it goes bad an artificial one may be used'
heart
MEDICAL KNOW-HOW: This organ has a natural pacemaker, but if it goes bad an artificial one may be used
This organ has a natural pacemaker, but if it goes bad an artificial one may be used
This organ has a natural pacemaker, but if it goes bad an artificial one may be used
MEDICAL KNOW-HOW
heart
MEDICAL KNOW-HOW