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Biology, 22.04.2020 02:17, kritalewis
Sammi decides to design a model to show how the digestive and circulatory systems interact. She lines a large plastic tube with a corrugated cardboard tube. Then, she connects smaller plastic tubes to the large plastic tube. These small tubes connect to a pump. She drills small holes in the large tube so that all of the plastic tubes connect.
She plans to run a green fluid representing food through the cardboard tube.
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Sammi decides to design a model to show how the digestive and circulatory systems interact. She line...
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