I, III and IV. Glomerular capillary blood pressure causes the filtration of the blood through three layers, i.e., (i) The endothelium of the glomerular blood vessels (ii) Epithelium of Bowman’s capsule (iii) Basement membrane between these two layers The epithelium of the Bowman’s capsule called podocytes are arranged in an intricate manner so as to leave some minute spaces called podocytes