Plant tissue is a collection of cells and intercellular substance that have a common origin, structure and perform certain functions.
The main fabric fills in the space between other fabrics. In the cross section of the plant stem, it can be seen that the main tissue fills the space between the integumentary and conductive tissues.
The cells of the underlying tissue are alive and have thin cell walls. In the cells of the main tissue, nutrients are created, they participate in gas exchange, and they accumulate substances.
Mechanical fabric gives plants strength. It is found in all organs of the plant. Much mechanical tissue is located in the trunk and leaf veins. Mechanical fabric keeps the trunk and branches of the trees upright.
The cells of mechanical tissue have thick cell walls; in some cells, the membranes are lignified. The cells of mechanical tissue are often elongated and have the appearance of fibers. Mechanical tissue cells may die, but solid, thick cell walls remain.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.