part of develops from ends during starts during mesonephric kidney mesonephric mesenchyme mesonephric nephron XAO:0000292 xenopus_anatomy nephron UBERON:0005322 XAO:0000145 The structure that is the basic functional unit of the adult or mesonephric kidney, consisting of the vascular loop of the glomerulus, the capsule, the nephrocoel, the nephric duct, the nephrostome and the nephric tubule. death multi-tissue structure NF stage 45