Uvula Purpose. is to prevent the food from going into the nose while swallowing. In other words, uvula blocks the internal opening of the nose while swallowing the food.It also guards the food from messing with the wind pipe. This phonological function of uvula is very important as proper speech depends on it.ence, purpose of uvula is to aid in proper swallowing of food. It also helps in blocking the wind pipe opening so that food does not enter it while swallowing. This prevents chocking of food which would otherwise obstruct in breathing. This aids in safe swallowing of food.