Explain working duty for the heart and lungs apply oxygen gas from the environment into the blood system in the human body and out carbon dioxide into the environment. premium vector by pattarawit

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illustration human health healthy blood medicine healthcare medical care breath Cardiology heart body biology lung oxygen system vessel organ valve tissue vein muscle Heartbeat anatomy cardiovascular circulation artery Cardiac atrium anatomical unconscious circulatory vena exhaling trachea aorta pulmonary coronary ventricle Carbon Dioxide alveolus blood vessel respiratory system circulatory system descending aorta pulmonary circulation internal medicine department cteph

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