<P> Humans have a four - chambered heart consisting of the right atrium , left atrium , right ventricle , and left ventricle . The atria are the two upper chambers . The right atrium receives and holds deoxygenated blood from the superior vena cava , inferior vena cava , anterior cardiac veins and smallest cardiac veins and the coronary sinus , which it then sends down to the right ventricle ( through the tricuspid valve ) which in turn sends it to the pulmonary artery for pulmonary circulation . The left atrium receives the oxygenated blood from the left and right pulmonary veins , which it pumps to the left ventricle ( through the mitral valve ) for pumping out through the aorta for systemic circulation . </P>
<P> Humans have a four - chambered heart consisting of the right atrium , left atrium , right ventricle , and left ventricle . The atria are the two upper chambers . The right atrium receives and holds deoxygenated blood from the superior vena cava , inferior vena cava , anterior cardiac veins and smallest cardiac veins and the coronary sinus , which it then sends down to the right ventricle ( through the tricuspid valve ) which in turn sends it to the pulmonary artery for pulmonary circulation . The left atrium receives the oxygenated blood from the left and right pulmonary veins , which it pumps to the left ventricle ( through the mitral valve ) for pumping out through the aorta for systemic circulation . </P>
where does the left ventricle recieve blood from
where does the left ventricle recieve blood from
The left atrium
The left atrium