The function of the digestive system is to

a. prepare food for digestion b. eliminate waste c. both a and b d. neither a nor b

Explanation:

The human digestive system is the breakdown of food into smaller components to be absorbed. Digestion has three stages:

Cephalic phase: It's the gastric secretion to receive food. It triggers when perceive food though our senses. This stage is developed in the mouth, preparing food to swallowed as a bolus.

Gastric phase: When the bolus is produced and swallowed, it goes to the esophagus, to enter the stomach, where the gastric phase takes place, which is digestion process. There, the food is further broken down with gastric acids, to go into the duodenum.

Intestinal phase: Here the food is mixed with enzymes, which are produced by the pancreas, to absorb minerals and nutrients. The waste is defecated from anus.