ANATOMY

Detailed explanation-1: -In Stomach HCl (hydrochloric acid) present which is highly acidic in nature. These acid kills the bacteria which came with food. This acid also helps to break food particles into small particles.

Detailed explanation-2: -Gastric acid in the stomach kills most organisms that are swallowed.

Detailed explanation-3: -In mouth, salivary lysozyme kills the bacteria whereas in stomach, hydrochloric (HCl) acid kills bacteria.

Detailed explanation-4: -The Stomach The acidic conditions will usually kill any harmful bacteria accidentally entering via the food. The stomach also produces several enzymes including protease and lipase for the digestion of proteins and fats.

Detailed explanation-5: -Scientists in the U.S. and Italy have discovered that fragments of the stomach enzyme pepsinogen, which when activated normally help to digest proteins in our food, also have antibiotic activity that can kill food-borne and lung pathogens.