Answer
There are pores or fenestrations in the endothelium of the blood vessels in the capsule, which together with the podocytes around the glomerular afferent capillaries form the filtration membrane. Water, and solutes that pass through the filtration membrane constitute the filtration fraction of the arteriolar plasma.
Work Step by Step
There are no blood cells in the glomerular filtrate because the diameter of the fenestrations in the filtration membrane are too small to allow the passage of cells into the capsular space.
