The heart of an elephant is

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(B) The correct answer is $(b)$. The heart of an elephant,like all mammals,is myogenic. This means that the heartbeat is initiated by a specialized pa

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Myogenic

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(B) The correct answer is $(b)$. The heart of an elephant,like all mammals,is myogenic. This means that the heartbeat is initiated by a specialized patch of modified cardiac muscle cells known as the sinoatrial node ($SA$ node),which acts as a pacemaker. It does not require external nerve stimulation to initiate the contraction of the heart muscle.

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