The contraction of the heart of frog
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The origin of heart beat of frog is myogenic. It means that alike mammals, the first wave of contraction occurs inside the heart muscle itself. If a frog's heart is separated from its body and placed in well-oxygenated Ringer's solution, it keeps on beating. Central nervous system and endocrine system are required only to maintain rare of heart beat.
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Excitation of frog heart is myogenic, That is contraction of heart
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