When we smell our meal, the saliva starts to form in our mouth
MOUTH: inside the mouth the food is broken down by teeth. The saliva moistens the food and it contains enzymes that start the chemical breakdown of food.
between the esophagus and the stomach, there's a passage that normally opens only one way-- from the esophagus to stomach
ESOPHAGUS: After the food is chewed, it is pushed by the tongue to the throat where muscles move it to the esophagus.
STOMACH: From esophagus , food gets into stomach. The stomach breaks down food physically and chemically and through the actions of enzymes.
food leaves the stomach and enters small intestine through pylorus.
SMALL INTESTINE: The contraction of small intestine continue to break the food physically. the enzymes in small intestine break down the food chemically and absorbs the nutrients. the body produce enzymes to digest all nutrients
LARGE INTESTINE: The components of food that remain, goes into the large intestine or colon where most of the fluid are absorbed. the bacteria that reside in large intestine decompose the carbohydrates (mostly fiber).
RECTUM: It is the last stop before the feces is eliminated. similar to the colon, electrolytes (sodium, potassium,chloride) are absorbed and indigestible ingredients are decomposed by anaerobic bacteria.
ANUS: The solid waste matter leaves the body through anus.