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Multicolor poster with red, black, and blue lettering. Visual image is illustrations of hearts and ways to record their heart beat. This is chart #9 of the Carlson Physiology Charts & Health, Hygiene, Safety and First Aid Charts set. There are images of a fish heart, amphibian/reptile heart, bird/mammal heart, a human heart before and after a pump, a container of blood, two graphs, a kymograph, a man stepping on a chair, and a doctor listening to a man's chest with a stethoscope.
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