A worksheet aimed at advanced biology students, this resource is suitable as a lesson starter for a topic on gas exchange in fish. The worksheet requires students to consider the difference in circulatory system layout between a fish and a mammal before focusing on the differences between concurrent and counter-current exchange.
Key words: fish, circulatory, counter-current, concurrent, blood, gas exchange, oxygen, carbon dioxide, gills, Fick's law, equilibrium, surface area, concentration gradient, exchange surface
Key words: fish, circulatory, counter-current, concurrent, blood, gas exchange, oxygen, carbon dioxide, gills, Fick's law, equilibrium, surface area, concentration gradient, exchange surface
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