In frogs, venous blood from the intestine and venous blood from the hindlimbs pass through specific intermediate capillary beds before eventually reaching the heart. Identify the intermediate organs for these two routes respectively.

Step-by-step solution

In frogs, there are two special venous connections called portal systems. The hepatic portal system connects the intestine to the liver, meaning venous blood from the intestine first passes through the liver. The renal portal system connects the lower parts of the body to the kidneys, meaning venous blood from the hindlimbs first passes through the kidneys. Therefore, the intermediate organs are the liver and the kidney, respectively. Answer: Liver and Kidney