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Definitions of atrium
  1. noun
    any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
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  2. noun
    the central area in a building; open to the sky
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Definition that contains atrium
  • ventricle a chamber of the heart that receives blood from an atrium and pumps it to the arteries
  • auricle a small conical pouch projecting from the upper anterior part of each atrium of the heart
  • vena cava either of two large veins that return oxygen-depleted blood to the right atrium of the heart
  • right ventricle the chamber on the right side of the heart that receives venous blood from the right atrium and pumps it into the pulmonary trunk
  • mitral valve valve with two cusps; situated between the left atrium and the left ventricle
  • inferior vena cava receives blood from lower limbs and abdominal organs and empties into the posterior part of the right atrium of the heart; formed from the union of the two iliac veins
  • atrioventricular node a node of specialized heart muscle located in the septal wall of the right atrium; receives impulses from the sinoatrial node and transmits them to atrioventricular bundle
  • precava receives blood from the head and arms and chest and empties into the right atrium of the heart; formed from the azygos and both brachiocephalic veins
  • auricular appendix a pouch projecting from the top front of each atrium of the heart
  • bicuspid valve valve with two cusps; situated between the left atrium and the left ventricle
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