Vascular tissue

is composed of wood and ligaments of water and nutrients, and has a certain support function of plant
tissue
. In plants with secondary growth (most bare-child plants and woody twin leaf plants), the phytosiical tissue consists of the primary woody and primary ligaments from the original formation layer (also known as the primary phytosiical tissue) and secondary woody and secondary ligaments (jointly called secondary phytoskinal tissue) from the vein formation layer. In plants that are only born and growing (most ferns and single-leaf plants) the tube tissue consists only of the primary wood and the primary ligament from the original formation layer. In plant systems, plants with tube tissue in the body are called phytosiology plants. In the process of plant evolution, the differentiation and appearance of vitilization is of great significance for plants to adapt to the land environment.。