DIGESTIVE SYSTEM

The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. Food passes through a long tube inside the body , the gastrointestinal tract.It is made up of the oral cavity, pharynx, esophagus, stomach, small intestines, and large intestines. In addition to the alimentary canal, there are several important accessory organs that help your body to digest food...

FUNCTIONS OF THE DIGESTIVE PROCESS

Ingestion: food is crushed by the teeth and mixed with saliva.

Digestion: juice enzymes break down nutrients into simpler molecules.

Absorption: simple molecules pas trough  the walls of the tube and are transported through the blood.

Assimilation: cells use nutrients to obtain energy or make new molecules.

Defecation: undigested or non-absorbed sustances are removed by the anus.

Digestion begins in the mouth. 

The teeth crush the food

 and the secretions of the salivary 

glands moisten them and initiate

 their chemical decomposition into 

the food bolus. Then, the bolus

 crosses the pharynx, continues 

through the esophagus and reaches

 the stomach whose mucous 

secretes the potent gastric juice, in 

the stomach, the food is agitated to 

become in the chyme.At the exit of 

the stomach, the digestive tube is

 prolonged with the small intestine. 

The digestivetract continues through 

the largeintestine, Its final portion is

 therectum,which ends in the anus,

 through which the indigestible 

remains of food are evacuated.