Continued growth is sustained by the meristem's constant addition of new cells to the youngest end of the elongation zone. Zone of Maturation Farthest from the root tip. Region where the new cells become specialized in structure and function and where the three tissue systems complete their differentiation. The protoderm is the outermost primary meristem. Gives rise to the epidermis over which water and minerals must cross.
Root hairs are epidermal extensions which increase surface area, thus enhancing uptake.
In dicots, xylem radiates from the stele's center in 2 or more spokes, with phloem in between the spokes.