Source:http://linkedlifedata.com/resource/umls/id/C0230646
GO: An apical plasma membrane part that forms a narrow enfolded luminal membrane channel, lined with numerous microvilli, that appears to extend into the cytoplasm of the cell. A specialized network of intracellular canaliculi is a characteristic feature of parietal cells of the gastric mucosa in vertebrates. [GOC:mah, ISBN:0721662544, PMID:10700045]