Topic: Excretion: modes, nephron, urine formation, osmoregulation· Human Physiology

In mammals, which blood vessel would normally carry largest amount of urea ?

1. Renal Vein

2. Dorsal Aorta

3. Hepatic Vein

4. Hepatic Portal Vein

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Answer: 3. Hepatic Vein

Urea is made in the liver, so the blood leaving the liver through the hepatic vein carries the largest amount of urea. The renal vein carries blood after urea has been filtered out by kidneys. The hepatic portal vein brings blood from the intestine to the liver, before urea formation.

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In mammals, which blood vessel would normally carry largest amount of urea ?

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