To turn food into a pulp, the stomach's mucous membrane produces gastric juice - a strong acid that can break down food and proteins and even bits of bone. It also kills bacteria. But how does the wall of the stomach protect itself from acid burns?
How can we lead a healthy life? What is good for our body and soul? What kind of exercise can make us - or keep us fit? Find out more on In Good Shape, the health show on DW.
