title: The origins and development of biological rhythms.
mesh_terms: D000222:Adaptation, Physiological; D000305:Adrenal Cortex Hormones / Q000097:blood; D001683:Biological Clocks; D002940:Circadian Rhythm; D004777:Environment; D006801:Humans; D009732:Nursing Care; D012894:Sleep Stages
chemical_list: D000305:Adrenal Cortex Hormones