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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners.
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| navigate by keyword : circadian rhythm cycle body clock sleep wake melatonin cortisol suprachiasmatic nucleus scn master pineal gland chronobiology diurnal stages schedule daylight exposure biological science hygiene alertness levels peak temperature hormone secretion phases health time day performance morning production misalignment timing hour physiology outline diagram |
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| Circadian rhythm brief cycle, the brains SCN times melatonin as sun and clocks map day-night changes. Key objects, brain, sun, clock. Outline diagram |
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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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