part of part of contributes to morphology of composed primarily of kidney interstitial fibroblast kidney stroma interstitial tissue kidney interstitium renal interstitium SCTID:362210003 EMAPA:28518 UBERON:0005215 interstitial tissue of kidney MA:0002616 The interstitial compartment of the kidney, comprising the extravascular intertubular spaces of the renal parenchyma, with their attendant cellular elements and extracellular substances, bounded on all sides by epithelial and vascular basement membranes. kidney interstitium group FMA:70983 stroma of kidney NCIT:C33459 renal interstitial tissue renal stroma