Root hairs are fine appendages that originate from the root. They are highly sensitive and are able to probe water and nutrients from the soil.

Root hairs are protoplasmic extensions of the epidermal cells. They greatly expand the surface area of the root so that minerals and water are more easily absorbed. DIAGRAM: Root Anatomy PHOTO

Short-lived extensions of root epidermal cells that increase the absorptive capacity of the root system by 20 to 30%.