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Vocal cord
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The vocal cords are one group of the features of the human larynx responsible for the production of sound, including speech. They work like a reed instrument, vibrating and modulating the flow of air being expelled from the lungs.
Structurally, the vocal cords are a pair of flaps, resembling the valves of the heart, on either side of the larynx. Their tension and shape can be adjusted by muscles.
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