Blood bank in human body is
The correct option is A, Spleen
Explanation of correct option-
Explanation of incorrect option-
Heart is the pumping organ of the body. It collects the deoxygenated blood from the body through vena cava and pump it to the lungs where the blood get oxygenated and reversed back to the heart via pulmonary veins.The oxygenated blood then directs towards the body via arteries.
Final answer: Blood bank in human body is Spleen