Fairywork

Digestion: the process by which foods are broken down into molecules. Absorption: the process of taking the products of digestion (molecules) across the gastrointestinal (GI) tract walls and into circulation. Elimination: the process by which undigested food and waste products are removed from the body.

Biological classification is the scientific procedure of arranging organisms into a hierarchical series of groups and sub-groups on the basis of their similarities and dissimilarities.