The venous system of frog differs from the of a mammals in the presence of ______?

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The venous system of frog differs from the of a mammals in the presence of ______? Answer: Renal portal system

The venous system of a frog differs from that of a mammal in the presence of a renal portal system, which transports blood from the lower body to the kidneys, and the hepatic portal system, which is present in both but formed differently, with the frog's also containing a functional renal portal system.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.