Physiological Hygiene

From a public health point of view, the actors controlling human health can be classiunder two main heads?internal and ?xternal. The internal factors include heredity na physique, the latter being determined a^gely by nutrition, and the external factors Physical and social environments. individual health is to a great extent ^ependent on the individual's hereditary characeristics?physique, intelligence and aptitude. 1milar]1y, racial health is, according to recent rends of thought, dependent on the application certain eugenic methods. In fact, the science