What Are the Different Organs in the Integumentary System?

By J. One of the three tissue systems proposed by Sachs (1875) is a protective tissue system in which higher plants cover the surface of various parts of the body. It is tied with the vascular bundle system and the basic organization system as three major organization systems. It is usually composed of epidermis and stomata, water pores, and hairs formed by deformation of epidermal cells.

Epidermal system

(Plant epidermis)

Right!

By J. One of the three tissue systems proposed by Sachs (1875) is a protective tissue system in which higher plants cover the surface of various parts of the body. It is tied with the vascular bundle system and the basic organization system as three major organization systems. It is usually composed of epidermis and stomata, water pores, and hairs formed by deformation of epidermal cells.

Chinese name

Epidermal system

The outermost layer of cells in a plant. It has protective functions in the above-ground organs of plants (such as stems, leaves, flowers, fruits and seeds); it has absorption functions in underground organs (roots). When the roots and stems grow thicker, the epidermis is squeezed and damaged and replaced by another protective tissue peridermis. A protective epidermis with tightly packed cells and no intercellular spaces (except for guard cells in the stomata). In the organs of some plants, epidermal cells divide flatly (dividing in parallel with the surface of the organ), producing several layers of cells called compound epidermis. In addition to the general epidermal cells, the epidermis has stomata (organs) and appendages such as hair. The epidermal cells of some plants have a variety of other special structures or inclusions, such as siliceous cells, plug cells, and vesicular cells in the leaves of grasses. The epidermis may also contain xenocytes, oil and other substances, and may also have stone cells and secretory cells. The epidermis of the root with absorption function, and some can develop into root hairs. Epidermal cells are covered with a layer of fatty substance on the surface of the outer wall, which is called the horny layer (also called the stratum corneum), which is most obvious on the surface of the leaves; this structure is also often found on the outer layer of epidermis and young roots of shoots, flowers and fruits. . The function of the cornea is mainly protective. It can not only limit the loss of water in the plant, but also resist the attack of microorganisms. The thickness of the cornea is greatly affected by the environment, such as leaves growing in dry conditions or in sunny places, the cornea becomes thicker and contains more wax. Some plant remains can survive the long-term geological changes under anaerobic conditions, and can perfectly preserve the structure of the cornea itself and the underlying epidermal layer, such as the type of stomata and their frequency of distribution, and even the epidermal appendages. Hairy appendages on the epidermis include glandular hairs, non-glandular hairs, scales, papillary protrusions, and absorbent hairs (root hairs) on the roots. They are distributed in all parts of the plant body and can persist or fall off quickly.