Describe the major disorders of the human digestive system.
Disorders of the digestive system: (i) Indigestion: It is the condition in which the food is not properly digested leading to a feeling of fullness. It is caused by inadequate secretion of digestive enzymes, food poisoning, overeating or spicy food. (ii) Constipation It refers to the condition where the faeces are retained in the rectum for longer periods as the bowel movements occur irregularly. (iii) Diarrhoea: It refers to the abnormal frequency of bowel movement and increased liquidity of the faecal discharge; absorption of food is impaired. (iv) Vomiting: It is the ejection of stomach contents through the mouth; this reflex action is controlled by the vomit centre in the medulla. It is due to viral infection, where liver is affected and digestion of fats is impaired. The eyes and skin turn yellow due to the deposit of bile pigments.
