Meristematic tissues are specialized plant cells that have the ability to divide and differentiate into various types of cells. These tissues are found in specific regions of the plant, such as the tips of roots and shoots, where growth occurs. They play a crucial role in the plant's growth and development, allowing for the formation of new leaves, flowers, and roots. There are three main types of meristematic tissues: apical meristem, lateral meristem, and intercalary meristem. Apical meristem is located at the tips of roots and shoots, promoting vertical growth. Lateral meristem contributes to the thickness of stems and roots, while intercalary meristem is found at the base of leaves and stems, aiding in regrowth after cutting or grazing.