結果 : how many vocal cords in human voice box
4:17

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Singing Vocal Folds

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Operation Ouch - Vocal Cords | Science Experiments

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Vocal cord motion during breathing

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larynx voice box #life #medico #photography #viral #mbbs #medical #doctor #voice #opd #shorts #life

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声帯を見つける

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02 Humans producing sound

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