Physiology and hygiene, which shall in each division of the subject so pursued include special reference to the effect of alcoholic drinks, stimulants, and narcotics upon the human system, and which shall also include special reference to tuberculosis and its prevention as well as nutrition and obesity, shall be introduced and studied as a regular branch by all pupils in all departments of the public schools, and in all educational institutions supported wholly or in part by appropriations from this Commonwealth.
24 P.S. § 15-1513