ROOT HAIRS OF RADISH SEEDLING. RAPHANUS SATIVUS. EACH HAIR IS A SINGLE EPIDERMAL CELL. ROOT HAIRS INCREASE THE SURFACE AREA. [Getty Images]

ROOT HAIRS OF RADISH SEEDLING. RAPHANUS SATIVUS. EACH HAIR IS A SINGLE EPIDERMAL CELL. ROOT HAIRS INCREASE THE SURFACE AREA.

Photolibrary Ed Reschke