Q69 of 367 Page 75

What prevents the back flow of blood inside the heart during contraction?

Valves prevent the backflow of blood inside the heart during contraction. They allow the flow of blood in only one direction.

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Blood is pumped from the heart to the entire body by the:

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The blood leaving the tissues becomes richer in :

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Which of the following is the correct path taken by urine in our body?

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In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body ?