Question: 169. In frog, the Renal portal system is a special venous connection that acts to link :
(1) Liver and intestine
(2) Liver and kidney
(3) Kidney and intestine
(4) Kidney and lower part of body
Answer: Option (4)
Explanation:
In frogs, the renal portal system is a special venous arrangement.
It carries blood from the lower part of the body such as hind limbs and pelvic region to the kidneys.
The blood passes through renal capillaries before returning to the heart.
This system helps in the removal of nitrogenous wastes from the blood.
Thus, the renal portal system links the kidney with the lower part of the body.
Therefore, the correct answer is Option (4).