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Question
In the heart of frog, which of the following is considered as the pacemaker?
In the heart of frog, which of the following is considered as the pacemaker?
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Solution
The correct option is C Sinus venosus
In amphibians, such as the frog, the pacemaker is the sinus venosus, an enlarged region between the vena cava and the right atrium. The venae cavae do not open directly into the auricles but into another chamber, the sinus venosus, which drains into the right auricle.
In amphibians, such as the frog, the pacemaker is the sinus venosus, an enlarged region between the vena cava and the right atrium. The venae cavae do not open directly into the auricles but into another chamber, the sinus venosus, which drains into the right auricle.
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