Diseases of GIT are a major cause of morbidity & mortality. Infective diarrhea & malabsorption are responsible for much ill health in developing countries. The GIT is the most common site for cancer development. There have been great advances in the understanding , diagnosis & management of the GI diseases.
Upper esoph. sphincter
Lower esop. SphincterPylorus
Ileocaecal Valve
Anal sphincter
Receptive relaxation Regulated emptying
Migrating motor complex
Segmentation Propulsive peristaltic contraction