why is heart in fish contains only deoxygenated blood?
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A fish's heart pump only deoxygenated blood as it is a two-chambered heart with an atrium and a ventricle.
In fish, the heart only has one atrium and one ventricle. The oxygen-depleted blood that returns from the body enters the atrium, and then the ventricle, and is then pumped out to the gills where the blood isoxygenated, and then it continues through the rest of the body.
In fish, the heart only has one atrium and one ventricle. The oxygen-depleted blood that returns from the body enters the atrium, and then the ventricle, and is then pumped out to the gills where the blood isoxygenated, and then it continues through the rest of the body.
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