Root Hair | Botany | Britannica

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root anatomy
- In plant: Leaves and roots
  …above the root tip are root hairs that are active in water and mineral absorption. Two types of root systems are commonly distinguished, fibrous roots and taproots. Fibrous root systems are composed of large numbers of roots nearly equal in size; root systems of this type are found, for example,…
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importance in

angiosperms
- In angiosperm: Roots
  Root hairs also begin to develop as simple extensions of protodermal cells near the root apex. They greatly increase the surface area of the root and facilitate the absorption of water and minerals from the soil.
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pteridophytes
- In lower vascular plant: Roots
  …cells of the epidermis produce root hairs near the root apex. These cells are generally thin-walled, in contrast to the cells of the cortex, lying below the surface, which ultimately may become very thick-walled. The root hairs have fundamental importance in absorption of water and nutrients and in attachment of…
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trees
- In tree: Tree roots
  Root hairs form some distance back from the root tip and mature at about the point where the first primary xylem cells mature. A type of transfer cell and supplied with many protoplasmic connections to the adjacent root cells, root hairs increase the absorbing area…
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