Linked from
The 15 pages that link to Urine, each with the reason it gives.
UreterRelated: Urine is the material the ureter transports from the kidney to the bladder.
Kidney stoneRelated: Its solute concentration and acidity shape which crystals can form.
CreatinineRelated: Most creatinine removed from blood ultimately leaves the body in urine.
SewageRelated: Urine contributes water, nitrogen, and other dissolved substances to sewage.
UrinationRelated: Its movement out of the bladder is the substance and purpose of urination.
ExcretionRelated: Its composition reflects kidney waste removal and regulation of body fluids.