The pizza that you ate for lunch is being digested. Summarize what happens to it in your stomach.

a. The waste materials are compacted and then removed from the body.
b. The pizza is mechanically broken up by teeth and mixed with saliva.
c. The pizza is churned, mixing it with digestive enzymes and gastric acid.
d. Enzymes from the liver and pancreas break down fats and proteins in the pizza.

1 answer

In your stomach, the pizza is primarily subjected to step c: it is churned and mixed with digestive enzymes and gastric acid. This process helps break down the food into a semi-liquid form called chyme, which facilitates further digestion. While other options describe parts of the digestion process, they occur in different locations or stages. For instance, mechanical breaking up by teeth and mixing with saliva happens in the mouth (option b), and the breakdown of fats and proteins by enzymes from the liver and pancreas occurs in the small intestine (option d). The waste materials are compacted and removed from the body in the later stages of digestion (option a).