What the cell, Characteristics cell wall, plasmodesmata, Node

1. Understanding

If we talk about the cell must have thought was something small and grow in all living things. Both are on the plant or animal. But you know what the most striking difference from an animal cell with plants ?? Yup right once the cell wall, plant cells have a cell wall and animals do not. Characteristics that is proportional to the function where the cell walls are used for a variety of needs such as to absorb and distribute the food into orgael cell organelles, protects organelles and other cell organelles. by (Savitri, 2005: 25) "The cell is the smallest unit in living beings. It poses protoplasm that is composed of carbohydrates, fats, proteins and nucleic acids ".

If we talk about the cell must have thought was something small and grow in all living things. Both are on the plant or animal. But you know what the most striking difference from an animal cell with plants ?? Yup right once the cell wall, plant cells have a cell wall and animals do not. Characteristics that is proportional to the function where the cell walls are used for a variety of needs such as to absorb and distribute the food into orgael cell organelles, protects organelles and other cell organelles. by (Savitri, 2005: 25) "The cell is the smallest unit in living beings. It poses protoplasm that is composed of carbohydrates, fats, proteins and nucleic acids ".

Well this time we will only focus on plant cells only, the title plant anatomy. (Mulyono, 2009: 619) said plant cell is defined as the basic unit of an organic universal. The structures that distinguish plant cells and other cells is the presence of cell wall is the outer layer of cells that is adjacent to the cell membrane.
Cells divided into two eukaryotic ie having a complex structure whose contents encased by a plasma membrane, prokaryotic that do not have nuclear membrane binding organelles (Yuni, 2005: 67).

Plant cells have a cell wall that is his name, between the walls of cells with other cell wall separated by the middle lamella. Besides do you know what characteristic of plants darisel apart from the cell wall ?? Ie plastids formed by a double membrane, the outer membrane and an inner membrane that hold the pigments such as chloroplasts, the plastids containing chlorophyll role in fotosisntesis, (2) kromoplas, the plastids that contain carotene, orange, golden yellow, or scarlet red, and (3) leukoplas, ie colorless plastids. Leukoplas containing starch called amiloplas, which contain oil called elaeoplas, and contains protein called proteinoplas. The role of chloroplasts in fotosinteisi not owned by the plant cell. Then there is the name of vacuoles in larger plants from animals which vacuoles function is to regulate the water content of the cell and the salinity level, a temporary reservoir metabolite results.

2. Characteristics

Well below I will explain some of the characteristic features of organes cells that exist in plants.
A. The cell walls.
As mentioned above, the cell wall is very important for the plant. The cell walls which are separated by the middle lamella which are made of the middle lamella pectin compound. The function of the middle lamella attaches particular cells in the cell walls of the plant body. Lamela is like a plastic nature. So that the cells will be very easy in the process of development. The cell wall is divided into two areas by development
- Primary cell wall: cell wall is formed during cell division, the cell wall is the first cell wall.

- The secondary cell wall: cell wall is formed after the cells undergo differentiation, or rather we can say is the secondary wall thickening of the wall primer.
Primary cell wall composed of cellulose and hemicellulose in which the cellulose tesusun of poly β-glucose straight chain. And hemi cellulose mixture of several kinds of other substances. The cellulose join and bind to each other to form a used cellulose microfibrils which the number of files it very much so rejoin to form microfibrils and microfibril yarn beam forming microfibrils which eventually form the woven irregular and be the primary cell wall. Aside from woven microfibrils file also contained lignin compounds, pectin water. Tucked between the hollow space between the fabric of space microfibrils. While the main material of the secondary wall cellulose compounds also. But on the secondary wall, the space between the fabric microfibrils filled by lignin so that the walls become stiff and hard

1. Furthermore, no such thing plasmodesmata

plasmodesmata is part of the cell wall and the location is on the wall cells could say plasmodesmata in as an existing pipeline on the drains, and his function is almost the same because the place tranprotasi substances from one place to another so, plasmodesmata is a channel cytoplasm that connect two protoplasts in cell adjoining. Its function is as a means of communication and transport between cells. Inside there is also a channel plasmodesmata desmotubul channel, which is channel that connects the two endoplasmic reticulum in cells side by side.

2. Node

Nokah like aperture formed by imperfect cell wall growth process, due to the unequal distribution of components forming the cell walls so that there are certain parts that are not channeled and empty. On the formation of the primary wall, the wall material is not deposited on the entire surface of the middle lamella. Consequently formed grooves that do not have the wall material. The area is called the dot or dots primordium simple. Node is usually (not always) formed in the area plasmodesmata, causing dots formed on each of the cell wall adjoining the so-called nodes pairwise When growth occurs secondary wall, then the curve node simpler the inside leading to the node shielded This can happen if Extra wall on the curve area curved toward the simple node in the node. Shielded node structure is more complex than a simple node, which has a casement dots, holes dot, dot space and membrane dot.

B. Source reading:

What the cell, Characteristics cell wall, plasmodesmata, Node