All deoxygenated blood returning to the heart from the systemic circulation first flows into the:?

The short and sweet. Blood gets oxy in lungs then thru pulmonary viens goes to left atrium- thru mitral valve to left ventricle- out of heart to rest of body thru the aortic valve. Blood travels to the tissues where oxygen is picked up and used . The deoxygenated blood then goes back to rt side of heart to rt atrium then across tricuspid valve to rt ventricle and thru pulmonary artery to lungs to get oxy.

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