Pharynx is a wide opening at the back of the mouth. It is the cavity where air passes from nose and food passes from mouth is pharynx. It is located at the back of our mouth and nose. This organ receives chewed food from mouth and passes to the oesophagus. Pharynx prevents the food from entering the wind pipe.

The digestion of food is completed in the small intestine. Then the digested food is absorved by the villi. The remaining part of the food is pushed toward the large intestine. The large intestine absorbs the excess of water from the food and turns it into semi-solid form. The undigested and waste form of food travels down and gets collected in the rectum, which is passed out from the  anus.

The esophagus is a muscular tube extending from the pharynx to the stomach. It is also known as food pipe. It is a muscular and cylindrical involuntary organ. It is made of soft muscles which make the chewed food travel through it and reach the stomach.

Anus is the terminal part of alimentary canel. It is the last part of the digestive tract. It consists of the muscles that line the pelvis and two other muscles called anal sphincters (internal and external).The undigested and left over solid waste (stool) gets collected in rectum. When the stool gets filled in the rectum, it is passed out through Anus.

Digestion is the process of breaking down of complex food into simpler forms which can be absorbed by the body cells. The digestion of food starts with chewing of the food by our teeth into small particles. The foods get mixed with saliva which lubricates the food. The food is pushed into the food pipe through pharunx. Through the food pipe, food enters stomach from where the food slowly moves into the small intestine.The semi-digested food then passes toward the jejunum and ileum of small intestine. A large number of glands are present in these parts of small intestine which secreter intestinal juice. The digestion of food is completed in the small intestine. Then the digested food is absorbed by the villi. The remaining part of food is pushed toward the large intestine. The large intestine absorbs the excess of water from the food and turns it into semi-solid form. The undigested and waste for of food gets collected in the rectum and is passed out from the anus. The process of digestion starts with the mouth and ends with the anus.