What is a pulmonary vein?

  • A
    Carries deoxygenated blood from the lungs to the heart.
  • B
    Carries oxygenated blood from the lungs to the heart.
  • C
    Carries deoxygenated blood from the heart to the lungs.
  • D
    Carries oxygenated blood from the heart to the lungs.

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The sequence of electrical impulse conduction in a heartbeat is:

$SAN$ can generate impulses at a rate of:

The two auricles are demarcated externally from the ventricles by an irregular groove called:

Which artery carries deoxygenated blood,unlike all other arteries?

How much of the total blood volume is present in the heart (in $\%$)?

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