#nutrient absorption

• Digestive system — A complex assembly of structurally and functionally correlated organs (oral cavity, pharynx, esophagus, stomach, intestines, liver, and pancreas) responsible for the ingestion, fragmentation, digestion of food, absorption of essential nutrients, and elimination of unassimilable residues. This macroscopic system guarantees the energy supply of the entire organism through the chemical and mechanical transformation of nutrients.
• Assimilation — The act of assimilating and its result; a complex process through which an organism transforms external nutrients into its own living matter. In sociology, it represents cultural fusion or the adoption of dominant cultural traits by a minority group; in phonetics, it denotes a sound's structural modification under the influence of a neighboring one by acquiring identical features.