I. Introduction
Stomach is the internal organ, in which the major part of the digestion of food occurs. Being a pear-shaped enlargement (in humans and many mammals) of the alimentary canal, it links the oesophagus to the small intestine. Stomach might be the source for various diseases such as digestion problem, ulcer, gastric and so on. Stomach is responsible for storing and mixing acid in the food items, so that small intestinal can better digest the food. The diseases occurred in the stomach would affect this process which needs to be concerned more.