The most logical answer would be urine, and it is!
Urine.
urine urine
The ureter is found between the kidney and the urinary bladder. It is responsible for carrying urine from the kidney to the bladder.
The urinary bladder stores urine. It is a muscular sac where the fluid is held after it has been processed and filtered by the kidneys.
The bladder stores urine before it is urinated out of the body.
urea
Benzodiazepines: up to 6 weeks with high level use Urine sample results are usually reported as positive (substance is found) or negative (no substance is found).
The bladder.
They carry the urine to the bladder. The urethra takes urine from the bladder to the outside.
the bladder
A bag like organ that holds urine is the bladder.