digestive system

                          digestiensive    system

the parts of the digestive system  are:
digestive  tract
digestive glands


the process of digestion has many stages, the first of which starts in the mouth. Digestion involves the breakdown of food into smaller and smaller components which can be absorbed and assimilated into the body. The secretion of siliva helps to produce a bolus  which can be swallowed in the  oesphagus to pass down into the stomach.

  the digestive system transforms food         into nutriens

 Saliva also contains a catalytic enzyme called amvlase. which starts to act on food in the mouth. Digestion is helped by the mastication of food by the teeth and also by the muscular contractions of peristalsis. Gastric  juice in the stomach is essential for the continuation of digestion as is the production of mucus in the stomach.