why fish heart is called venous heart ?
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fish heart is called as venous heart because has it only receives blood from veins and pump get directly to the gills for oxygenation . In fish heart blood pressure only 1 in 1 complete circuit . THANKS
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In fishes, the heart receives only deoxygenated blood from all body parts therefore it is also called venous heart.
The heart pumps deoxygenated blood to gills which oxygenate and supply blood to all body parts.
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