<span>The calyces.
Renal pyramids are simple constructions of nephrons that exist within the kidneys. Renal tubules are don't deal with the collection of urine. And juxtamedullary nephrons process and act in the formation of urine.</span>
- Energy Production (providing energy)
- Energy Storage
- Breakdown of fatty acids
- Building Macromolecues
c this is the answer because if you go back to any other ones they dont make sense so :(