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In a fish, the heart pumps

ADeoxygenated blood that goes to the gills
BOxygenated blood that goes to the body
CMixed blood out through both chambers
DBlood through a four-chambered circuit
Answer & Solution
Correct answer: A. Deoxygenated blood that goes to the gills
Fish heart (2-chambered) pumps DEOXYGENATED blood that the gills oxygenate before delivery to the body. The body then returns deoxygenated blood to the heart. This is SINGLE circulation.
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