It was the podocyte that firstly formed basement membrane, and then the endothelial cells continued.Fusion of them led to the formation of a thick glomerular basement membrane.

• 足细胞下先出现电子密度较低的基膜，随后内皮细胞下才出现基膜，以后，二者融合形成一层电子密度较高的血管球基膜。