1. The heart exhibits auto-rhythmicity as the impulse for its rhythmic contractions originates internally, a characteristic known as myogenicity.
2. Certain cardiac muscle fibers acquire self-excitability during development, contributing to the generation of impulses.
3. These self-excitable fibers serve crucial roles as pacemakers, establishing the heart’s rhythm.
4. Additionally, they constitute a conductive system facilitating the transmission of nerve impulses across the entire heart muscle.