[ **up: [[Biology]]** ] --- # Biological rhythms 1. Rhythms without apparent external correlates: brain waves. breathing, heartbeat 2. Rhythms correlated with natural geophysical cycles: solar-day rhythms, lunar-tidal rhythms, monthly rhythms, annual or seasonal rhythms, epochal rhythms 3. The mechanism of the biological clock 4. Factors affecting biological peniodicities 5. The amplification and superimposition of individual rhythms in communities --- - *See also:* - [[Cell cycle]] - [[Circadian rhythms]] - [[Periodic diseases]] - [[Sexual cycle]] - [[Ultradian rhythms]]