Which structures carry urine made by nephrons to the calyces for excretion?

1. Finished urine must travel from the nephrons to the kidney's exit. 2. The papillae are bundles of collecting ducts that transport urine made by nephrons to the calyces. 3. Columns are supportive tissue and the vasa recta are blood vessels, not urine channels. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section Nephrons and Vessels_