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melatonine |
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| navigate by keyword : alarm biological body brain chronobiology chronotype circadian clock cycle daily day diagram educational endogenous epiphysis fatigue frequency health hour human illustration infographic internal labeled loop melatonin melatonine mental midnight model morning natural night nocturnal noon organic oscillation process regulation regulator repeatedly rhythm schedule scheme scientific secretion sleep structure time vector |
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| Circadian rhythm vector illustration. Labeled educational day cycle scheme. Daily human body inner regulation schedule. Natural sleep-wake biological process explanation and chronobiology infographic. |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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