Answers

2014-09-16T19:59:23+05:30
After consumption of food,the intestinal tract with a series of muscle contractions, push food and waste products through the esophagus and small intestine. this process is called peristalsis. some animals use muscle contractions to move the cud in mouth so that it can be chewed again. this is called reverse peristalisis. it triggers vomiting in human. this happens in humans when they have health problems and sometimes intentionally. 
Example : ruminants such as cows and goats.
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2014-09-16T20:28:33+05:30
IT IS A FANCY MATERIAL TERM FOR VOMITING.PERISTALSIS IS THE NORMAL SLOW MOTION OF THE GASTROINTESTINAL TRACT THAT MOVES FOOD ALONG TO BE ABSORBED.WHEN IT IS REVERSED IT GOES IN THE OPPOSITE DIRECTION CAN LEAD TO VOMITING.SYMPTOMS ARE REMINATION,INTESTINAL OBSTRUCTION, METOCLOPRAMIDE HYDROCHLORIDE,etc.,
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