1) 1&2 a) Oxygenated blood returns from the lungs through the pulmonary veins to the left atrium b) Blood returns from the body through inferior& superior vena cava to Rt atrium 2) 3&4 a) From right ventricle, blood pumped through pulmonary valve into pulmonary artery to lungs to get rid of CO2 b) Left ventricle pumps oxygen-rich blood through the aortic valve into the aorta to the whole body 3) 7&8 a) From right ventricle, blood pumped through pulmonary valve into pulmonary artery to lungs to get rid of CO2 b) Left ventricle pumps oxygen-rich blood through the aortic valve into the aorta to the whole body 4) 5&6 a) Blood returns from the body through inferior& superior vena cava to Rt atrium b) Oxygenated blood returns from the lungs through the pulmonary veins to the left atrium

Double Circulation

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