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Question
Give scientific reason.
Human heart is called as myogenic and autorhythmic.
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Solution
- The heart shows autorhythmicity because the impulse for its rhythmic movement develops inside the heart. Such a heart is called myogenic.
- During development, certain heart muscle fibres become autorhythmic (self-excitable) and begin to generate impulses.
- These autorhythmic fibres have two vital functions: they operate as a pacemaker and set the heart's beat.
- They also form a conducting system for the conduction of nerve impulses throughout the heart muscles.
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