located in located in develops from develops from has potential to develop into has potential to develop into nephron epithelial tube kidney mesenchyme renal vesicle kidney epithelium excretory tube primitive nephron UBERON:0010532 future nephron developing nephron EHDAA2 treats this as already having a tubular structure, but in the ZFA representation this is a cluster of cells An epithelial tube that is fated to become a nephron. primitive nephron presumptive nephron