A root system with skin cells of the root. With the cells that resemble a sponge surface layer thickness and the shipyard does not resemble a fur store and absorb a lot of water, a sponge. Can bring water to use as skin cells throughout the length of the root. Semi root root systems often have a large populace rough weather like the dense. No root hairs, root root is smaller than the mild air. Orchid Orchid root systems include air semi Cattleya genus Cincinnati dia m AF, etc.