Celery Experiment Highlights Veins
By definition, a higher life form organizes its cells into particular functions. In the case of plants, water and nutrients are transported by specialized cells from the root to the leaves. Children may be familiar with the systems of veins that carry blood throughout their bodies but not know about veins within plants.

Pale-colored plant parts such as celery or white flowers are best suited for this experiment. Place the cut end of the leaf, stalk, or flower into diluted ink or water colored with food coloring. The color can then be observed to spread through the veins. There is usually some noticeable effect in an hour. Check to see what happens to the plant when it is left in the coloring.

For Discussion

Celery with leaves should color up faster than the leafless stalk. Encourage discussion on how the leaves might be involved with moving water through a plant.
Celery is an excellent subject for vein study. The coloring can be seen as it progresses through the plant. Red and blue tints make the best contrast. Try two pieces together -- one with leaves on, one with leaves cut off. Cut the celery stalk crosswise so that the position of the veins that are transporting the color can be seen easily. Any celery eater knows that the veins are tough enough to provide some structural support as well.
 
 
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