The secretion of goblet cells of mucosa (mucous) along with the secretion of brush boder cells of mucosa in the intestine constitutes intestinal juices or succus entricus. Theses intestinal juices are rich in enzymes like maltase, dipeptidase, nucleosidaes, sucrase, lactase, enterokinase, aminopeptidase and nuceotidase. The enzymes present in the intestinal juices acts upon the end products of the food, which are then converted into simple absorbable forms