metanephric mesenchyme
metanephric mesenchyme
"One of the two embryological structures that give rise to the kidney (the other is the ureteric bud). The metanephric blastema mostly develops into nephrons, but can also form parts of the collecting duct system.[WP]. Metanephric mesenchyme is the tissue made up of loosely connected mesenchymal cells in the metanephros[GO]."