kosikabhitti tatha kosikajhilli me nul antar kya hai
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kya.... what is your question not understanding
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etroperistalsis is the reverse of the involuntary smooth muscle contractions of peristalsis. It usually occurs as a precursor to vomiting. Local irritation of the stomach, such as bacteria or food poisoning, activates the emetic center of the brain which in turn signals an imminent vomiting reflex.
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