Why do we have hiccups
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Hiccups are caused by involuntary contractions of your diaphragm — the muscle that separates your chest from your abdomen and plays an important role in breathing. This involuntary contraction causes your vocal cords to close very briefly, which produces the characteristic sound of a hiccup.
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We have hiccups when Carbon dioxide gets inside our lungs
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When dioxide gets inside our lungs we get hiccups to make the carbon dioxide out from our lungs as we need oxygen not carbon dioxide
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