The left part...the left auricle & left ventricle
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Oxygenated blood is pumped out of the heart by the left ventricle.
Through the inferior and superior vena cavaThe left atria of the heart is where oxygenated blood enters, it is then pumped to the left ventricle and then to the rest of the body thru the systematic circuit. The heart is separated by the septum, which separates oxygenated and deoxygenated blood.
Through both! The pulmonary veins carry oxygenated blood to the heart and then arteries carry it from the heart to the body as a whole. Veins return de-oxygenated blood to the heart.
oxygenated
The heart takes in oxygen from the environment and delivers it to cells.