It would cease to expel water in the designed fashion.
The paramecium would eventually die because the paramecium wouldn't get any water and without the water-expelling vesicle the paramecium can't get the water out without getting other bacterias while doing so.
You will die.
coco
You will die.
it died
we;d die
If it stopped working then you would die. You wouldn't die if you were put on the a machine right away.
vesicle
you would die
youwill die.
You would die
you would die