part of part of results in development of anatomical structure development glomerular mesangium development metanephric glomerular mesangium development 2010-03-18T03:35:56Z The process whose specific outcome is the progression of the metanephric glomerular mesangium over time, from its formation to the mature structure. The metanephric glomerular mesangium is the thin membrane connective tissue composed of mesangial cells in the metanephros, which helps to support the capillary loops in a renal glomerulus. biological_process GO:0072223 metanephric glomerulus vasculature development metanephric glomerular mesangium