'Heartburn has nothing to do with the heart; it's caused by acid from the stomach rising back into this tube'
Esophagus
THE BODY HUMAN: Heartburn has nothing to do with the heart; its caused by acid from the stomach rising back into this tube
Heartburn has nothing to do with the heart; it's caused by acid from the stomach rising back into this tube
Heartburn has nothing to do with the heart; it's caused by acid from the stomach rising back into this tube
THE BODY HUMAN
Esophagus
THE BODY HUMAN