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Circadian clock: time governing a woman's sleep

Circadian clock: time governing a woman's sleep

P895/0018

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Credit

OSCAR BURRIEL / SCIENCE PHOTO LIBRARY OSCAR BURRIEL / SCIENCE PHOTO LIBRARY

Caption

Cycle of sleep. Abstract image of a clock mechanism and a woman asleep, depicting the biological cycle of sleep. Many biological processes are believed to take place under the direction of an internal body clock mechanism. Sleeping and waking, for example, are based on a daily or circadian (24-hour) cycle and are regulated by hormones such as melatonin and cortisol.

Release details

Model release available. Property release not required.

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