Plant tissues can be divided into three main types: meristematic tissues, simple tissues, and complex tissues. Meristematic tissues contain actively dividing cells and are found in areas of growth like apical and lateral meristems. Simple tissues consist of one cell type like parenchyma, collenchyma, and sclerenchyma. Complex tissues are more specialized tissues like xylem, phloem, and periderm which are composed of multiple cell types organized into structures.