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The best studied rhythm in chronobiology is the circadian rhythm, a roughly 24-hour cycle shown by physiological processes in all these organisms.The term circadian comes from the Latin circa, meaning "around" and dies, "day", meaning "approximately a day."
The biorhythm theory is the pseudoscientific idea that peoples' daily lives are significantly affected by rhythmic cycles with periods of exactly 23, 28 and 33 days, [2] [3] [4] typically a 23-day physical cycle, a 28-day emotional cycle, and a 33-day intellectual cycle.
Overview, including some physiological parameters, of the human circadian rhythm ("biological clock").. Chronobiology is a field of biology that examines timing processes, including periodic (cyclic) phenomena in living organisms, such as their adaptation to solar- and lunar-related rhythms. [1]
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A zeitgeber (/ ˈ (t) s aɪ t ɡ eɪ b ər, ˈ z aɪ t-/ (T)SYTE-gay-bər, ZYTE-, German: [ˈtsaɪtˌɡeːbɐ]) is any external or environmental cue that entrains or synchronizes an organism's biological rhythms, usually naturally occurring and serving to entrain to the Earth's 24-hour light/dark and 12-month cycles.
Biorhythm may refer to: Biorhythm (pseudoscience), developed by Wilhelm Fliess in the 19th century; Biological rhythm, repetitive cycles that occur in biology ...
The biorhythms graph shows the basic cycles, physical (23 days), emotional (28 days) and intellectual (33 days), from the day of the person's birth. Spanish La gráfica de los biorritmos muestra los ciclos básicos, físico (23 días), emocional (28 días) e intelectual (33 días), desde el día de nacimiento de la persona.
A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours.Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).