How the Kidneys Produce Urine 4

Any substances that don't absorb in the tubule are wastes that the body cannot use. The other waste go into the tubular fluid by the tubular cells of the kidney. Various substances, such as ammonia, urea uric acid and excess water is urine. The urine goes through the convoluted tubules into larger tubules, then goes into the kidney's pelvis layer. The ureter carries the urine from both kidneys into the urinary bladder, then passes out a tube called the urethra. Kidneys can produce about 1-2 litres of urine everyday.