Abstract
The urinary system is comprised of paired kidneys and ureters, the urinary bladder, and the urethra. Plasma and waste collected in the lymphatics and bloodstream are carried through the kidneys and filtered through the nephrons. Waste is centrally collected, then flows through the ureters to the urinary bladder where it is collected over an extended period. Once the bladder fills to capacity, the waste is processed through the urethra and expelled.