The renal artery carries blood to the kidney, while the renal vein carries blood, now with far lower concentrations of urea and mineral ions, away from the kidney. The urine formed passes down the ureter to the bladder. The liver converts ammonia to urea, which is excreted in urine by the kidneys.
Therefore, concentration of urea increases in this sequence:
Renal vein

Date Posted: 5 years ago

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