Answers

2016-04-24T12:28:09+05:30
The removal of undigested food or clotted blood from pharynx or oesophagus .
this process is used by a number of species for feeding


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2016-04-24T12:31:27+05:30
It means when you swallow food and sometimes we bring back it to our mouth is called regurgitation. 
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