" Our stomach sits much higher in our abdomen than we think. It begins just below the left nipple and ends below the bottom of the ribcage on the right. Any pain felt farther down than this lopsided little pouch cannot be stomachache. Often, when people say they have stomach problems, the trouble is actually in the gut. The heart and the lungs sit on top of the stomach. This explains why we find it more difficult to breathe deeply after eating a lot. "

― Giulia Enders , Gut: The Inside Story of Our Body’s Most Underrated Organ