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abdominal acids ACQUIRED activity adjustment amino acids amount ANTIVACCINATIONISTS arch bacteria bath become blood body bones calcium calories carbohydrates carbon cause cells cent chemical chiefly CLASS DISCUSSION clothing cold common cold condition constipation contain correct posture Courtesy daily dental caries dermis develop diet dietary digestion disorders dysmenorrhea effect emotions energy environment ergosterol exercise factors feet foot fresh air functions give rise harmful health habits heat human humidity Hygeia hygiene important r6le increased individual infection intestinal keep known medicine mental health metabolism metatarsal milk mind mouth mucous membrane muscles needed normal Nutrition occur organs oxidation oxygen personal hygiene perspiration Philadelphia phosphorus physical physician poor posture position prevent proper properly proteins QUESTIONS FOR CLASS recreation requires ringworm roughage shoe skin sleep sunlight symptoms temperature tion tissues toes tonsils tuberculosis ultraviolet rays usually vaccination vegetables ventilation viosterol vitamin W. B. Saunders weight