Answer:
1.the main function of the heart is Pumping oxygenated blood to the other body parts. Pumping hormones and other vital substances to different parts of the body.
2.the main function of the lungs Through breathing, inhalation and exhalation, the respiratory system facilitates the exchange of gases between the air and the blood and between the blood and the body's cells.
3.The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide.
Explanation:
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