An epithelium consisting of myopethelial cells, which are contractile cells resembling smooth muscle cells that are present in glands, notably the mammary gland, and aid in secretion. This cell has long weaving dendritic processes containing myofilament[CL]. [ http://purl.obolibrary.org/obo/CL_0000185 http://en.wikipedia.org/wiki/Myoepithelial_cell ]