Circadian rhythm concept with tiny woman. Human biological clock to regulate sleep wake and day night cycle. Routine, morning to evening changes, planet movement around sun. Body natural daily rhythms premium vector by redgreystock

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vector background circle illustration day girl sunlight sun morning health healthy light life change dark weather time clock winter concept night sleep biological evening woman flat lifestyle balance organic planet science cycle system daily routine mental schedule midnight rhythm around internal daytime brain wake nocturnal phase fatigue Regeneration circadian

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