Find Your Free Essay Examples

Ironically, the longest part of the alimentary canal is the small intestine.

Ironically, the longest part of the alimentary canal is the small intestine. It is a highly coiled structure of about 7.5 meters in length. It is a very narrow tube with a large internal surface area. It is the site of complete digestion in humans. It absorbs digested food completely. It secretes intestinal juice. It receives bile juice from the liver and pancreatic juice from the pancreas.

The small intestine is divided into three parts:

The food that is digested is absorbed into the blood vessels in the walls of the intestine.

The finger-like projections known as villi, drastically increase the surface area of the small intestine for greater absorption of the digested food.

The blood carries the absorbed food material to different parts of the body. Glucose breaks down to form oxygen and carbon dioxide and releases the energy required for various life processes.

The undigested and unabsorbed food passes from the small intestine to the large intestine. Also read :  Difference Between Small Intestine and Large Intestine

Your email address will not be published. Required fields are marked *

Save my name, email, and website in this browser for the next time I comment.