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When boredom causes us to yawn, the muscles around the lungs stretch or more oxygen is brought to the brain, which makes us feel awake. |
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Yawning, which may be caused by boredom, makes us feel awake by stretching the muscles surrounding the lungs or bringing more oxygen to the brain. |
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Boredom leads to yawning, and this makes us feel awake by stretching the muscles surrounding the lungs or bringing more oxygen to the brain. |
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Stretching the muscles around the lungs or bringing more oxygen to the brain, yawning, if caused by boredom, makes us feel awake. |
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When bored, yawning makes us feel awake by stretching the muscles surrounding the lungs or bringing more oxygen to the brain. |