Add several drops of red food coloring to a jar of clean water. Cut off a 1-inch piece of celery from the bottom of the celery stalk. Place the celery in the red water and leave it in overnight. Next morning, cut an inch off the bottom. The red dots show that the water has beeen drawn up into the celery stalk.
All plants draw water into their roots and up through the stalks, stems, or leaves.
If water contains chemicals and nutrients, plants can suck them up along with the water and store them.