Internal vs external respiration system with air exchange outline diagram. Labeled educational breathing with oxygen in lungs and O2 in blood vessel from anatomical perspective vector illustration. premium vector by VectorMine

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vector graphic illustration human transport health blood medicine healthcare breathing respiratory medical concept body exchange inside biology oxygen cycle system vessel outline inner organ cells gas process scheme educational internal dioxide diagram comparison description carbon external physiology lungs explanation circulation function artery co2 erythrocyte respiration anatomical labeled pulmonary O2

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