Catabolism
Oligo/polysaccharides are typically cleaved into smaller monosaccharides by enzymes called glycoside hydrolases. The monosaccharide units then enter monosaccharide catabolism. Organisms vary in the range of monosaccharides they can absorb and use, and also in the range of more complex carbohydrates they are capable of disassembling.
Read more about this topic: Carbohydrate Metabolism