Answer:
The food in their mouth is basically pushed to their stomach by muscles that are in the lining of the tube between their mouth and stomach. Then, in their stomach the digested food is pushed again into your intestines. In the early year of space travel, astronauts actually used straws to suck paste-like foods that were dehydrated, out of tubes. Drinks and foods will just float away if they werent handled properly in space.
Explanation:
