Internal structure of a woody plant stem

This model shows the structure of a wood plant stem. Wood plants have an additional layer of protection over the epidermis, consisting of cork cells known as the bark. The vascular fabric of the stem consists of complex tissues of xylems and floems that carry water and nutrients along and across the length of the stem and are located in the form of separate threads called vascular beams. The trunk and other organs of the plant mainly consist of three simple cell types: parenchyma, college and scleroshima.