What changes does the food undergo in the stomach?

What change does zinc undergo when it is reacted with dilute H_(2)SO_(4) ?

How does the food from oesophagus move into the stomach ?

Describe the digestion of food in the stomach.

The food from the stomach enters the

Answer the given question in short : What would happen if: Food enters the stomach and the stomach muscles do not move.

Muscle responsible for the movement of the food in the stomach are