part of develops from interstitial cell precursor embryonic/larval middle midgut embryonic/larval midgut interstitial cell FBbt:00001888 Columnar cell of the middle midgut, with short microvilli and deep infolding of the basement membrane forming a basal labyrinth. In the anterior region of the middle midgut, these cells alternate with copper cells. Their diameter increases from anterior to posterior. larval midgut interstitial cell fly_anatomy.ontology FBbt:00005626 midgut interstitial cell larval midgut enterocyte