Human Alimentary Canal
Core
Define Ingestion
Define egestion
Identify the main regions of the alimentary canal
and associated organs
Identify the main regions of the alimentary canal
and associated organs
Ingestion is the taking in of food to the body through the mouth.
Egestion is the passing of food out of the body which has not been digested, it leaves in the feaces through the anus.
Food enters the mouth and is turned into a bolus with the help of Saliva which contains mucus, Amalayse and water. The amalayse breaks down starch in the food into mucusand the mucus lubricates the food so that it can easily pass through the esophagus. Once food is ready to be swallowed, a sphincter muscle covering the esophagus opens and food travels into the Stomach. In the Stomach the food is made into Chyme with the help of protease. The proteins in the food are broken down into smaller and smaller molecules with the help of hydroclhoric acid (which helps the protease to fuction in the correct PH) Once the food has been broken down into chyme it is passed into the Small intestine where Pancreatic juice and bile are secreted. In the Pancreatic juice is an alkaline substance which neutralizes the churn so that amalayse and lipase may work on it. Bile emulsifies the churn, breaking down fats into smaller molecules for the lipase to have an easier job of working on it.
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