Root hairs

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1. tubular outgrowths of surface cells of the root.

fig3b-roothairs.gif

Root hairs can spread through the ground and help in absorbing water and nutrients. Be careful when digging up plants to transplant (transplanting). The hairs will be destroyed but can quickly grow back if the root is not damaged.
Source: http://extension.oregonstate.edu/mg/botany/roots.html