Alveoli a part of the respiratory system. Human silhouette, lungs and normal cardiogram at the background. premium vector by megija

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blue graphic illustration design human abstract air health healthy life blood medicine respiratory medical care breath man line silhouette pulse body disease exchange science oxygen system ill virus organ cells gas membrane anatomy mucus diagram external lungs tract cardiogram vessels respiration anatomical bronchi pneumonia capillaries pulmonary alveoli Carbon Dioxide alveolus alveolar

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