Biological clock. Conceptual computer image depicting human biorhythms,showing the face of a woman during sleep and wakefulness. Processes such as wakefulness and tiredness are based on a daily or circadian (24 hour) cycle regulated by hormones such as melatonin and cortisol | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gifford, David |
Taille de l’image : | 3954 px × 4524 px |
Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
Property Release : | Non requis |
Restrictions : | - |