title: Living systems. II. The organism.
mesh_terms: D000222:Adaptation, Physiological; D000828:Animal Population Groups; D000818:Animals; D001143:Arousal; D001519:Behavior; D005075:Biological Evolution; D001831:Body Temperature; D002940:Circadian Rhythm; D002965:Classification; D003071:Cognition; D004626:Embryology; D004644:Emotions; D006128:Growth; D006801:Humans; D007257:Information Theory; D008606:Mental Processes; D008954:Models, Biological; D009042:Motivation; D012679:Sense Organs