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This accessible textbook on human physiology, published by the Woman's Christian Temperance Union's National Department of Scientific Instruction, provides a thorough introduction to the workings of the human body, its organs, and systems, suitable for intermediate classes and common schools. The book's clear language, simple diagrams, and practical examples make it an ideal resource for educators and students interested in health and science. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.