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Product Information This set is one in a series examining comparative life function systems. This lesson deals with the process of supplying oxygen to the cells of the body and with the elimination of carbon dioxide and how different organisms are adapted for respiration in different ways. 1. Urosoma (200x) 2. Hydra–l.s. (130x) 3. Nereis–x.s. (1x) 4. Grasshopper–Spiracle (2x)/ Tracheal Tube (2x) 5. Minnow–Gills (8x) 6. Frog Lung–l.s. (1x) 7. Human Blood (900x) Frog Blood (400x) 8. Bronchial Tree (Human)  Tell a Friend about this item
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