Biological clock

Biological clock

P895/0032

Rights Managed

Caption

Biological clock. Conceptual image of a resting boy lying below a tree seen through a watch face, representing the biological clock. Processes such as wakefulness and tiredness are based on a daily or circadian (24 hour) cycle regulated by hormones such as melatonin and cortisol.

Release details

Model release available. Property release not required.

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