Question

if i will eat food hanging upside down the food will go through the alemantary canal

Answer 1

yaa it will go through the alemantary canal. by changing the position the functions of the organs doesn't change.

Answer 2

Yes it will go through your alimentary canal. The reason is due to the process of peristalsis, the muscular contractions that move food through the canal. Just take a look at astronauts, they are able to have perfectly normal movements in outer space (zero gravity)