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properties of and changes in matter
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Circulatory & Respiratory DVD Hands-On Learning & Models properties of and changes inGrades: 5 8 This DVD explores the circulatory and respiratory 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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