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2 av atria - PowerPoint PPT Presentation

Circulation and gas exchange

Circulation and gas exchange. Evolution. Open circulatory system Insects arthropods No difference between blood and interstitial fluid = hemolymph Gas exchange: rate of transfer proportional to surface area. Evolution. Fish: 1 atria 1 ventricle Heart to gills, gills to body

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2 av atria - PowerPoint PPT Presentation

Circulation and gas exchange