Which of the following is a similarity between the circulatory system of frogs and humans?

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Erythrocytes are nucleated and contain haemoglobin.

A sinus venosus receives blood from the venae cavae.

The heart is myogenic.

A renal portal vein carries blood from the lower parts of the body to the kidneys.

answer is C.

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Detailed Solution

The heart of vertebrates (including the frog and the human being) is myogenic. Contraction of cardiac muscle is spontaneous. Unlike in humans, RBCs of frog (and other non-mammalian vertebrates) are nucleated. Sinus venosus and renal portal system are absent in mammals.

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