Now, the function of the agranial cells is not yet known. So let's summarize our discussion of the renal corpuscle. So, we see that the renal corpuscle is involved in filtering our blood. About 20% of the blood that enters the globe, marylus, through the Afair Narteriol, is actually filtered into the Bowman space and travels into the proximal convoluted tubule of our nephron. The other 80% basically leaves via the Ethernet arterial and travels to the second capillary network system known as the Vasa rectan. Now, this membrane separating the space of the Bowman's capsule and the space the lumen of the capillaries inside the glomerulus consists of a membrane that has three layers.