The digestive-tract region containing specialized absorptive and secretory epithelium. Architecture differs between intestinal regions and species.
A lysosome-related organelle of the Caenorhabditis elegans intestine. Loss of granule formation can alter a gut-marker assay without eliminating the intestinal founder lineage.
An epithelial invagination housing proliferative populations in the adult mammalian intestinal lining. Crypt structure, supporting cells and developmental timing vary with region and species.
A projection of the intestinal lining that increases exposed absorptive surface. Mammalian small-intestinal villi must be distinguished from microscopic microvilli on individual epithelial cells and from the normally non-villous colon.
