Ingestion - is the taking in of food into the body through the mouth.
Digestion - is the breakdown of large,insoluble food molecules into simple,soluble molecules by means of enzyme.
Mechanical Digestion - the cutting and/or crushing action of the teeth followed by the rhythmical contractions of the gut.
Chemical digestion - involves ezymes secreted by glands outside the gut (Salivary gland,Pancreas) and glands located within the gut wall itself
Absorption - is the passage of digested food through the gut wall into the blood.
Egestion - is the elimination from the body of food that can not be digested e.g. Cellulose cell walls of plants.
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