The walls of left ventricle are thicker than the walls of right ventricle because

  • it has to pump blood to the whole body
  • it has to pump the blood to lungs
  • blood reaches this ventricle in huge amount
  • blood reaches this ventricle with extra pressure

The vessel which takes the blood from heart to lungs, is known as

  • renal artery
  • pulmonary artery
  • renal vein
  • pulmonary vein

The beating of pulse is due to

  • energy
  • flow of blood
  • flow of water
  • oxygen

Tiny vessels link up and form a

  • artery
  • vein
  • capillary
  • nerve

The clot of blood formed in the blood vessel is known as

  • hemophilia
  • anemia
  • thrombosis
  • varicose vein
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