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Set of 20 paperback books
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Digestive & Excretory DVD Special Education & Life Skills Set of 20 paperback booksGrades: 5 8 This DVD explores the digestive and excretory systems in detailhow they function, how they are maintained, and how they interrelate with other body systems. Microphotography, animations, diagrams, experiments and investigations help students fully understand each of these vital systems. Includes a teachers guide. 23 minutes. '
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