Each plant organ is composed of tissues: groups of cells performing a function. A tissue is classified by its origin, function, and structure. Any plant organ may have several tissues.
There are numerous tissues in a plant, some simple: comprising a single cell type, such as ground tissue and various fibers; and some complex: with multiple cell types, including vascular and outer tissues. All plant tissues are produced from meristem.
Unlike animal cells, which move during development, plant cells are immotile. As such, the decision-making, hormonal, and genetic networks for plant tissue growth are unique.