Question

The blood loaded with carbon dioxide from the body comes into the______of the heart.​

Answer 1

right atrium which is not guarded by any valve

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Answer 2

Answer:

The blood loaded with carbon dioxide from the body comes into the left ventricle of the heart.​

Explanation:

Double-circulation of blood

the carbon dioxide rich blood from the left ventricle passes through the vena cava(biggest vein) to reach the lungs for oxygenation. The oxygenated blood from the lungs passes through the aorta(biggest artery) and reaches the right atrium. From the right atrium the blood is pushed down to the right ventricle. From there the blood is carried out by the aorta to different body parts. The deoxygenated blood from different body parts reaches the left ventricle and thus forms a cycle.