The colénquima is a present in young and herbaceous plants supportive tissue. The name comes from the Greek: " " " rubber tail " name given by the ease with which the cell walls become swollen to hydrate it. It provides flexibility to the young stems, petioles and nerves of the leaves. Their distribution is usually subepidermal ( below the epidermal tissue ).Is composed of living cells ( unlike the 41 esclerénquima; and elongated, rich in water and substances pectic observed bright in the optical microscope, and the thick cell wall composed of cellulose. This tissue cells have slightly wider primary walls in some areas, and their cytoplasm may contain chloroplasts and vacuoles with crystals.There are several types of colénquima, according to the shape of the cells and the location of the thickening of the pared:angular: with thickening at the corners.Tangential, laminated or lamellar: with thickening in the tangential walls or periclinales.Lagoon: with thickened walls that limit the intercellular space.Mass: it is derivative with strong thickening on the walls.I hope have served it, greetings worth (:
