The root system of a cell surface roots. A thick layer of cells And resembles a sponge The outer surface smooth hairless Like a sponge and absorb as much water storage. Can be used by cells throughout the length of the roots. The root system of semi-rough weather, often with large roots are very dense. No root hairs The root is smaller than the root. Orchid roots are semi weather Orchids, cattleya On currencies, the City Stadium.