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DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 1 Heart is an organ which beats continuously to act as a pump for transport of blood, which carries other substances. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Your heart is roughly the size of your fist. Pulse is due to

A) blood flowing is arteries

B) blood flowing in veins

C) blood flowing through capillaries

D) none of these