Venous system of frog differs from that of rabbit in presence of
A
Hepatic portal system
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B
Renal portal system
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C
3 vena cavae
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D
Hepatic vein
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Solution
The correct option is B Renal portal system Renal portal system is well developed in fishes and amphibians (frog), it is reduced in reptiles and birds and is absent in mammals (rabbit).