Which tissue type is responsible for the downward movement of nutrients in the vascular system?

The phloem tissue is primarily responsible for the transport of nutrients, particularly the sugars produced through photosynthesis, throughout the plant. It enables the movement of these organic compounds from the leaves, where they are synthesized, to various parts of the plant such as stems, roots, and fruits. This downward movement is essential for providing the necessary energy and building blocks for growth, storage, and development in non-photosynthetic tissues.

In contrast, xylem is responsible for the upward movement of water and minerals absorbed from the soil to the leaves, where photosynthesis occurs. Parenchyma cells are involved in storage, photosynthesis, and tissue repair but do not play a primary role in nutrient transport. Cambium, a type of meristematic tissue, contributes to growth in thickness by producing new xylem and phloem but does not transport nutrients itself. Understanding the specific functions of these tissues helps clarify why phloem is the correct choice for nutrient movement in the vascular system.