There are two ways that a tree can take in water: through the leaves and through the roots.
Trees absorb small amounts of moisture from the air through their leaves and their bark. Most of their water, however, comes via the roots.
Water enters the roots through thin membranes at their tips. The tree's vascular system draws the water up through the trunk and distributes it to the leaves. The leaves use the water to dissolve minerals. Excess
water goes back to the air through pores in the leaf - a process called transpiration.