Q12What is single circulation, Explain with "venous heart".
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The heart pumps out deoxygenated blood which is oxygenated by the gills and sent to the body parts from where deoxygenated blood is carried to the heart. It is called single circulation and heart is called venous heart
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Answer:
venous heart is single circuit and the heart pumps blood all over the body with only a single loop. Deoxygenated blood circulates to the atrium from the body, and afterwards the deoxygenated blood moves to the ventricles from the atrium. Next, the blood reaches the gills for purification.
Explanation:
The fish heart is called the venous heart because it only receives blood from the veins and pumps it for oxygenation straight to the gills.
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