alleryIn which group does the heart NOT pump oxygenated blood to the body at all?
ACrocodiles
BMammals
CBirds
DFishes
Answer & Solution
Correct answer: D. Fishes
In fish, the two-chambered heart pumps only deoxygenated blood to the gills (where it is oxygenated, then sent directly to the body).
The heart never handles oxygenated blood.
Mammals/birds pump oxygenated blood from the left ventricle.
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