Question

how do you prove that our digestion process starts with our mouth​

Answer 1

hey your answer is here

The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food.
The digestive process starts in your mouthwhen you chew. Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food. Esophagus

Answer 2

The process of digestion starts with our mouth can be proved by the following line:-

The breaking down of food is first done in the mouth by chewing the food and mixing the food with saliva which contains the salivary amylase.