left atrium
US /ˌleft ˈeɪ.tri.əm/
UK /ˌleft ˈeɪ.tri.əm/
1.
the left upper chamber of the heart that receives oxygenated blood from the lungs and pumps it into the left ventricle
:
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Blood flows from the lungs into the left atrium.
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A common heart condition affects the function of the left atrium.