Question

name the organ of the body from which blood freshly enriched with oxygen goes into the heart

Answer 1

It's lungs from which pulmonary veins carry oxygenated blood to left atrium of heart.

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Answer 2

The organ that is being referred to here is very important for the survival of the human body and the body cannot function without it and any damage done to it is fatal and hence it is one of the most important organs after the heart.

This organ is the lungs which is the organ that purifies the blood and enriches it to have more oxygen every time the blood passes through it.