part of pronephros development anatomical structure development glomus development The progression of the glomus over time from its initial formation until its mature state. The glomus forms from the splanchnic intermediate mesoderm and is the vascularized filtration unit, filtering the blood before it enters the tubules. The glomus is external to the nephron and extends over more than one body segment. biological_process mah GO:0072013 2010-01-25T02:23:19Z pronephric glomus development