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Respiratory
It takes in oxagen and rid of carbon dioxide. -
Pharynx
the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus. -
Trachea
a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe. -
epiglottis
a flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.