Digestive Process
A) Ingestion occurs when materials enter the digestive tract
by the mouth.
B) Mechanical processing begins with the chewing and
mastication by the teeth and tongue. It is continued all along
the digestive tract by the involuntary muscle contractions of the
smooth lining the stomach walls and intestines.
C) Chemical digestion is breakdown of food into small organs
fragments suitable for absorption by the digestive epithelium. It
starts in the mouth where saliva containing certain enzymes begin
to break down carbohydrates and continues in the stomach and
intestines as other enzymes and acid is releases as food
progresses through the digestive tract.
D) Absorption takes place mainly in the small intestines,
through important nutrients and water are absorbed by the large
intestine.
E) Compaction is the job of the large intestines. This makes
the feces ready for elimination.