What mechanical and chemical digestion occurs in the stomach

Explanation:

There are two kinds of digestion;

i) Mechanical and ii) chemical digestion.  

Mechanical digestion involves physically breaking down  the food into smaller pieces. It begins in the mouth as the food is chewed.

In the Stomach

The stomach is a muscular sac with three important functions:

i) It mixes and stores food until it can be further digested.

ii) It secretes chemicals that help break the food into more digestible forms.

iii) It controls the passage of food into the small intestine.

Chemical digestion involves breaking down the food particles into simpler nutrients that can be used by the cells.  

In stomach, chemical digestion of mostly  proteins occurs  Secretions from the stomach lining consist of about two liters of HCl, pepsin, and other  many fluids that make up gastric fluids. The fluid is acidic and it helps kill bacteria and  many other pathogens. It also produced by the stomach lining usually keeps the acids from damaging the lining. If no mucus or  too much acid is produced, peptic ulcers form.