Plant Systems
“Plant Systems Question” Each organ of a plant – leaf, stem, or root – has three tissue systems: the dermal, vascular and ground tissue systems. The dermal tissue, or epidermis, is generally a single layer of tightly packed cells that covers and protects various parts of the plant. ... Each individual plant cell contains a large amount of water. Without this water, the cells could not carry on the many processes that take place within a plant.