What is the urinary system?
The urinary (or renal) system is a system comprising the kidneys, ureters, bladder, and urethra collectively responsible for filtering blood and disposing of waste through urine.
The urinary system starts with the kidneys which are made up of nephrons each consisting of a glomerulus and its tubule. Blood that enters the kidney through the renal artery is fed to the glomeruli through arterioles and capillaries and plasma is pushed into the glomeruli where toxins are filtered out before the capillaries reabsorb the plasma leaving the liquid with waste (urine) in the tubule.
These tubules then transport the urine through the ureters to the urinary bladder where it is stored till it is expelled through the urethra.
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