The conception of digestion and absorption Digestion:Process by which food and large molecules are degraded to produce smaller molecules that can be absorbed across the wall of the gastrointestinal tract. Absorption:Process by which nutrient molecules are absorbed by cell that 人類的消化系统 @束只大学版检石 line the gastrointestinal tract and enter the bloodstreamThe conception of digestion and absorption Digestion: Process by which food and large molecules are degraded to produce smaller molecules that can be absorbed across the wall of the gastrointestinal tract. Absorption: Process by which nutrient molecules are absorbed by cell that line the gastrointestinal tract and enter the bloodstream