Permanent tissue is a type of plant tissue that has differentiated and specialized cells, which perform specific functions. Unlike meristematic tissue, which is responsible for growth, permanent tissue does not divide. It is classified into two main types: simple and complex. Simple permanent tissues consist of one type of cell, while complex tissues are made up of multiple cell types working together. Examples of simple permanent tissues include parenchyma, collenchyma, and sclerenchyma. Complex permanent tissues include xylem and phloem, which are essential for transporting water, nutrients, and food throughout the plant. These tissues play crucial roles in the overall structure and function of plants.