lungs, trachea, heart, diafragm, , red blood cells, lungs, skin, muscles, , breathe out carbon dioxide, breathe in oxygen, sleep, pump blood, , lungs, diaphragm, trachea, nose, , trachea, heart, alveoli, skin, , breathe out carbon dioxide, breathe in oxygen, breathe out oxygen, breathe in carbon dioxide.
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Respiratory system
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Guetita2
Primaria
Ciencias Naturales
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