hormones of the gastrointestinal tract and enteroendocrine cell. enterocyte. human endocrine system

absorption anatomical anatomy appetite body cell cholecystokinin diagram diet digestion digestive education endocrine enterocyte enteroendocrine enteroglucagon epithelial epithelium gastric gastrointestinal gut health hormone hormones human hunger illustration intestinal intestine lining medical metabolism microvilli motilin mucosa organ peptide physiology regulate regulation science small somatostatin surface system tract use vasoactive vector villi villus