Permanent tissues are specialized groups of cells in plants that have completed their growth and differentiation. Unlike meristematic tissues, which are responsible for growth, permanent tissues serve specific functions such as support, storage, and photosynthesis. They can be classified into three main types: parenchyma, collenchyma, and sclerenchyma. Parenchyma tissues are involved in storage and metabolic functions, while collenchyma provides flexible support, particularly in young stems and leaves. Sclerenchyma consists of thick-walled cells that offer rigid support. Together, these permanent tissues play essential roles in the overall structure and function of plants.