The Circulatory and Respiratory system are connected in many ways. They work together by inhaling and exhaling. The heart pumps blood into the lungs where blood is oxygenated. Then the blood is returned to heart and oxy blood is circulated to the body. Also, the respiratory system performs a gas exchange that releases CO2 from the body and brings in O2.
Something interesting that i learned from the video is that, Simple diffusion is where some animals can take in oxygen without lungs but through wet membranes.
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