Root hair cells?(origin&location)

Question

is root hair cells located in the differentiation part of root?

and is it a differentiation of the epidermis?

its origin?

Answer 1

Root hairs are tubular-shaped tip-growing cells  that arise from root epidermal cells known as trichoblasts. Like all tip-growing cells, root hairs grow by the addition of cell wall precursors to the tip delivered by vesicles from the endomembrane system. Other examples of tip-growing cells are pollen tubes, fungal mycelia and moss protonema. Root hairs are thought to increase the absorptive capacity of the root by increasing the surface area

http://mac122.icu.ac.jp/rls/igd.html

Close up pic + info on :

http://www.hcs.ohio-state.edu/mgonline/B...

Answer 2

Root hairs do not arise from a meristematic zone but from the periderm of a root