Tissue it is a concept with several uses. It can be a material, a fabric or something that is formed by interlacing different components. In the field of zoology, the botany and the anatomy, on the other hand, a tissue is a cell set that, through a certain order and certain characteristics, act together to fulfill a function.
Vegetable, for its part, is that linked to plants: a living being that is born, grows, develops and dies but that, unlike animals (including humans), cannot move of its own accord.
The idea of Plant tissue, therefore, it is associated with a grouping of cells in plants. These tissues arise from the division of the cells that make up the embryo of a seed. Certain cells, in this way, acquire an important specialization that allows them to develop different functions.
It is possible to differentiate between meristematic plant tissues and the adult plant tissues. Meristematic plant tissues divide through the mitosis throughout the life of the specimen, giving rise to adult plant tissues.
Going deeper into these concepts, we can say that merismatic cell tissues (also called embryonic) are formed by cells capable of dividing, characterized by their small dimensions, their scarce specialization, the thinness of its walls, and for having large nuclei and small vacuoles (this is the name given to the cavities of the cytoplasm within a cell).
Merismatic plant tissues, in turn, are divided into two types: primary and the secondary. The primary ones are in charge of the developing of the embryo in the seed and of the physical expansion of the plant throughout, that is, of its longitudinal growth. They are found in the buds of the stem and in the root, both at the ends (parts of the vegetables that are called apical and they can be the tip of an organ such as a leaf) as in the axillary areas, from which branches and leaves will emerge in the future.
Secondary merismatic plant tissues, on the other hand, consist of cells from other, adults, which regain the ability to reproduce for a limited time and they are in charge of the thickening of the plant and the formation of new conductive vessels.
Second we have the adult plant tissues, also known as definitive or permanent, whose cells no longer have the ability to divide. However, it has been observed that sometimes they regain this function temporarily, as indicated in the previous paragraph; This occurs due to the action of fire or mechanical aggression. The definitive tissue can appear in several types, which join together to form systems and are found in many parts of the plant.
Among these adult tissues, in turn, it is possible to differentiate primary tissues (in charge of the vital functions of the plant) and the secondary tissues (typical of woody plants, they are responsible for protecting the organism).
Some of the plant tissues are listed below:
* epidermis: it is the outermost layer of young vegetables, and covers their surface in their entirety when they have a primary structure. It is also known as epidermal tissue and provides plants with protection against external factors, in addition to collaborating with the maintenance of their structure;
* collenchyma: is part of the group of bra fabrics of herbaceous and young plants. Its action contributes to the flexibility of the petioles, leaves and stems;
* xylem: she drives Water and mineral nutrients through a route that begins at the root and reaches the various organs;
* parenchyma– Found in most plants and forms a continuous shade. It is used for the reservation and transfer of elements.