Answer:
I am assuming you want to know which part of the nephron? If I am incorrect in assuming I apologize.
The Glomerulus (a mass/ball of capillaries= Waste products are removed from the blood, thus the formation of urine has begun.
The Bowman's Capsule = Waste products move from the Glomerulus to this location
The Renal Tubules (divided into 3 parts/sections= Re-absorption of waste products needed by the body to maintain homeostasis occurs here.
1. The proximal convoluted tubule
2. The Loop of Henle
3. The distal convoluted tubule
The Collecting Duct- Empties the remaining waste products, Urine (what was not reabsorbed at the Renal Tubules) empties out into the kidney via the collecting duct.
Hope this helps.