enteroendocrine cell. cell of the intestines. on background

absorption alimentary anatomy antimicrobial apparatus appendix based biology cell diagram digestion digestive drawing endoplasmic enterocyte enteroendocrine epithelium gland goblet granules gut health histology human illustration immunity infection intestine medical medicine micrograph microscope microvilli mucous nucleus oxyntic parietal pepsin physiology progenitor reticulum science small tissue vector vesicles villi villus