The answer is Xylem. The plant structure that helps transport water and nutrients from the roots to the leaves and other parts of the plant is Xylem. In vascular plants, plants that have TUBELIKE STRUCTURES that carry water, nutrients, and other substances throughout the plant have xylem (vascular tissue that carries water upward from the roots to every part of a plant) and phloem (vascular tissue tubelike vessels that transport sugar made in photosynthesis from leaves to plant).