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 development and are responsible for producing new cells that contribute to the plant's overall growth. There are two main types of meristematic tissues: apical meristem, located at the tips of roots and shoots, and lateral meristem, which is responsible for the growth in thickness. These tissues enable plants to adapt to their environment by allowing continuous growth and regeneration throughout their life cycle.