Mature plants are made up of two basic kinds of tissues, meristematic tissues and mature tissues. These tissues are usually composed of cells of one type but sometimes consist of several different kinds. Meristematic tissues are composed of embryonic, undifferentiated cells which can divide indefinitely. Mature tissues are composed of cells which may undergo only a limited number of divisions during normal development and usually cease dividing entirely. Such mature tissues often have highly specialized functions.
Among the mature tissues of higher plants are the surface tissue or skin of the plant, the vascular or conducting tissue, through which water and minerals move from one part of the plant to another, and the ground tissue, which is between the skin and the vascular tissue. The meristematic tissue or meristem include the growing tips of roots and stems; this tissue makes the plant grow.