An automatic or self-regulating rhythmic pattern that occurs naturally in biological systems without external control.
From Greek autos (self) + rhythmus (measured flow). This scientific term emerged in 20th-century physiology to describe inherent biological rhythms like heartbeats.
Your heart has its own internal pacemaker that beats without your brain telling it to—that's autorhythmus in action, and it's why doctors can transplant hearts from deceased donors; the new heart keeps beating on its own!
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