Introduction -- Gastrointestinal digestion models, general introduction -- Static digestion models general introduction -- InfoGest consensus method -- Approaches to static digestion models -- Dynamic digestion models general introduction -- The TNO gastro-Intestinal Model (TIM) -- Dynamic Gastric Model (DGM) -- Human Gastric Simulator (Riddet model) -- The DIDGI® System -- General introduction to cells, cell lines and cell culture -- Epithelial cell models; General introduction -- Caco-2 cell line -- HT29 cell line -- The IPEC-J2 cell line -- Co-cultivation of Caco-2 and HT-29MT -- Innate and adaptive immune cells; General introduction -- THP-1 and U937 cells -- Peripheral blood mononuclear cells -- PBMC-derived T cells -- Dendritic Cells -- Co-culture Caco-2/ immune cells -- Enteroendocrine Cell Models: General introduction -- STC-1 cells -- NCI-H716 cells -- Murine GLUTag cells -- In vitro intestinal tissue models: General introduction -- Intestinal crypt organoids as experimental models -- Porcine ex vivointestinal segment model -- Ussing chamber -- In vitro fermentation models: General Introduction -- One compartment fermentation model -- The TNO in vitro model of the colon - TIM-2 -- The Simulator of the Human Intestinal Microbial Ecosystem - SHIME® -- The computer-controlled multicompartmental dynamic model of the gastrointestinal system SIMGI.