#chamber.bodily_cavity  an enclosed volume (as the aqueous chamber of the eyeball or the chambers of the heart)
  supertype:  #bodily_cavity__cavity__cavum  (anatomy) a natural hollow or sinus within the body
  subtype:  #heart_ventricle__heartventricle__ventricle  a chamber of the heart that receives blood from an atrium and pumps it to the arteries
     subtype:  #left_ventricle  the chamber on the left side of the heart that receives arterial blood from the left atrium and pumps it into the aorta
     subtype:  #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
  subtype:  #atrium.chamber  any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
     subtype:  #atrium_cordis__atrium_of_the_heart  the upper chamber of each half of the heart
        subtype:  #right_atrium_of_the_heart__right_atrium__rightatrium__atrium_dextrum  the right upper chamber of the heart that receives blood from the venae cavae and coronary sinus
        subtype:  #left_atrium_of_the_heart__left_atrium__atrium_sinistrum  the left upper chamber of the heart that receives blood from the pulmonary veins

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