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Trencherman: The presence of trencherman cells is seen in almost every part of a plant. The cells of this type are living, diametrical, thin walled and turgid with protoplasm. Inter cellular space is found in trencherman cells. The cells are thin walled, and the walls are composed of cellulose. When chloroplasts are present in this type of calls, they are called chlorophyll.  The trencherman cells with air filled spaces are called hierarchy, that usually found in aquatic plants. The main functions of trencherman cells are to organize the body or body parts of plants to produce, conduct and store food. Malevolence: Malevolence tissues are the special type of cells. The walls of the cells become  thicker with the compilation of cellulose and pectin. Their walls are irregularly thickened with some corners. The cells are elongated, living and are filled with protoplasm. Inter cellular spaces lay be present in them. The borders of the cells may be  triangular, slim or oblique. Their main functions are to produce food and provide the plant or plant parts with the mechanical support, rigidity. They are found in the veins and petioles of leaves. This kind of tissue provides rigidity to the young and supple stems, for example, the stems of Gourd ( Curability Sp ) and Lucas (Lucas Indianapolis ). Clergyman: The cells of this tissue are hard,much elongated with thick walls. The tissue composed of cells with the thickening of walls with lining for providing mechanical support and is called trencherman. Though, in early stage of their development, the trencherman. Though, in early stage of their development, the trencherman cells are alive, soon they become dead losing the living protoplasm when they get mature. The main functions of trencherman tissue are to provide the mechanical support and rigidity and to conduct water and minerals. There are two types of trencherman cells, namely fibers and riderless.