SINGLE: 2 chambers (A and V), Low pressure, Found in fish, INCOMPLETE DOUBLE: 3 chambers (RA, LA, V), Blood leaving not fully oxygenated, Found in reptiles and amphibians, COMPLETE DOUBLE: 4 chambers (RA, LA, LV, RV), High pressure, Blood leaving fully oxygenated, Found in birds and mammals,

Circulatory Systems group sort

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