If you were to X-ray the same hundred people while they were vomiting, the picture would be the same a hundred times over. The brain responds to the alarm, activates the area responsible for vomiting, and switches the body to emergency mode. We turn pale as the blood drains from our cheeks and is sent to the abdomen. Our blood pressure drops, and our heart rate falls. Finally, we feel that unmistakable sign: saliva, and lots of it. The mouth begins producing it in great quantities as soon as it receives information from the brain about the emergency that’s underway. This saliva is meant to
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