Where does the first step in the process of urine formation occur?
Glomerulus
The first step in urine formation is also known as ultrafiltration. This process starts in glomerulus, which is a tuft of blood capillaries. The glomerulus is nestled inside a cup-like sac located at the end of each nephron which is known as Bowman's capsule. Blood undergoes filtration through the pores of glomerulus.