Question

1. what part of the digestive system first causes chemical changes to food? clear all o enzymes in the small intestine o enzymes in the stomach o saliva in the mouth o teeth in the mouth

Explanation:

The process of digestion starts in the mouth. Saliva in the mouth contains enzymes that begin the chemical - breakdown of food. Teeth in the mouth perform mechanical digestion. Enzymes in the stomach and small intestine act later in the digestive process.

Answer:

saliva in the mouth