Spanish Open dictionary by Valee

esclerénquima

  21

THE esclerénquima is a supportive tissue of some plants composed of dead cells to mature, whose secondary walls are species that are very thick and hard. Its name comes from the Greek escleros, " hard " enchyma, 34, 34 substance;.It is a stretch fabric, i.e. that it can be deformed but returns to its original form. The compound that gives their characteristics to the cell wall of the esclerénquima is the lignin present in greater or lesser extent in the cell walls of all plants. It provides high resistance to parts of the plant have continued to grow. In some cases they serve as half defensive, that give the plant resistance against the attacks of insects. Esclerenquimáticas cells differ from the colenquimáticas that have secondary walls usually lignificadas and that, when adult, often lack protoplast.I hope have served it, greetings worth (:

  

colénquima

  28

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 (:

  

amiláceo

  30

Definition of Amiláceo:e tissue of reservation or storage, its cells contain starch ( amiloplastos. Do we see him in a Pope, by ejemplo.¿En what other bodies of the plants we can see this fabric?OBSERVATION OF STARCHY PARENCHYMA. (Practice ) 1. Make Pope ( translucent ) 2 very thin cuts with a scalpel. Deposit the Court obtained in the portaobjetos.3. Add a drop of Lugol.4. Place a cubreobjetos.5. Lead to the microscope and enfocar.6. Observing with small, medium and large aumento.7. Draws the observado.* visible changes occur by placing lugol's in contact with the piece of Pope?.* What use this coloring this practice?I hope have served it.Greetings, worth (:

  

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