The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. In land animals, the respiratory surface is internalized as linings of the lungs.
The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. In land animals, the respiratory surface is internalized as linings of the lungs.
Source: Wikipedia "Respiratory system" · CC BY-SA 4.0
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