Question

Give scientific reason.

Human heart is called as myogenic and autorhythmic.

Answer 1

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