The text presents an elementary course in human physiology and hygiene for secondary instruction, combining anatomical description with applied physiology to explain bodily functions and the principles of healthy living. Organized in two parts, it treats vital processes—blood, circulation, lymph, respiration, digestion, metabolism, and excretion—and then motion, coordination, and sensation—skeleton, muscles, skin, nerves, and the special senses—culminating in practical guidance for keeping well. Emphasis is placed on accurate observation, laboratory and class experiments, clear summaries, and avoidance of misleading metaphors so that pupils build correct concepts and reasoning skills.