Cell: A cell is the basic structural and functional unit of a living organism. Example: Nerve cell. Tissue: A tissue is a group of cells having a common origin, similar structure and function and held together by a cementing substance. Example: Connective tissue. Organ: Different types of tissues working together and contributing to some specific function inside the body constitute an organ. Example: Stomach. Organ system: Different organs coordinate to perform a specific life process and form an organ system. Example: Digestive system. Organism: Various organ systems working simultaneously together constitute an organism. Example: Plants.
Cells are thin-walled and made up of cellulose.
Located at the tips of the roots and stems, base of the node, base of the internode or at the base of the leaf.
The cells of meristematic tissue divide actively, resulting in growth (increase in thickness and length) of plants.
Types of Meristematic tissues
Located at the growing points of the stem, roots, branches and in growing young leaves near the tips of stems and axillary buds.
Enables the root and stem to grow by increasing the length of plants.
Located at the internodes or stem regions between the places at which the leaves attach, and at leaf bases, especially of certain monocotyledons
The cells are active and continuously form a number of new cells.
Present laterally (on the sides) on the roots and stem and is situated parallel to the longitudinal axis below the bark.
The girth and width/diameter/thickness of the stem or root increases due to the lateral meristem.
Formed by the division of the meristematic tissue cells that have lost their ability to multiply.
Types of Permanent Tissue
1. Epidermis or surface tissue. 2. Cells with thick walls.
Found on the surface of the roots, stems and leaves.
1. Protects the underlying cells. 2. Provides protection against mechanical injury or invasion by parasitic fungi.