- published: 26 Apr 2016
- views: 3992
The cell wall is the tough, usually flexible but sometimes fairly rigid layer that surrounds some types of cells. It is located outside the cell membrane and provides these cells with structural support and protection, in addition to acting as a filtering mechanism. A major function of the cell wall is to act as a pressure vessel, preventing over-expansion when water enters the cell. Cell walls are found in plants, bacteria, fungi, algae, and some archaea. Animals and protozoa do not have cell walls.
The material in the cell wall varies between species, and can also differ depending on cell type and developmental stage. In bacteria, peptidoglycan forms the cell wall. Archaean cell walls have various compositions, and may be formed of glycoprotein S-layers, pseudopeptidoglycan, or polysaccharides. Fungi possess cell walls made of the glucosamine polymer chitin, and algae typically possess walls made of glycoproteins and polysaccharides. Unusually, diatoms have a cell wall composed of silicic acid. Often, other accessory molecules are found anchored to the cell wall.
Cell(s) may refer to:
A wall (from Old English weall) is a vertical structure, usually solid, that defines and sometimes protects an area. Most commonly, a wall delineates a building and supports its superstructure, separates space in buildings into rooms, or protects or delineates a space in the open air. There are three principal types of structural walls: building walls, exterior boundary walls, and retaining walls.
Building walls have one main purpose: to support roofs and ceilings. Such walls most often have three or more separate components. In today's construction, a building wall will usually have the structural elements (such as 2×4 studs in a house wall), insulation, and finish elements or surface (such as drywall or panelling). In addition, the wall may house various types of electrical wiring or plumbing. Electrical outlets are usually mounted in walls.
Building walls frequently become works of art externally and internally, such as when featuring mosaic work or when murals are painted on them; or as design foci when they exhibit textures or painted finishes for effect.
He's planning a robbery
Lack of common sense
Bad vibes and a story
That stands for accidents
And now he's gonna get lucky
This time he'll play it smart
By the time lucky gets lucky
When he steps out of the getaway car
Yeah, now he's gonna get lucky
This time he'll play it smart
By the time lucky gets lucky
When he steps out of the getaway car
Feeling fine rhymes on cell 29
Feeling lonely in cell 29
I can remember your face
And I pace and I pace in C29
Callin' further needs, max security
Feeling fine rhymes on cell 29
Feeling lonely in cell 29
I can remember your face
And I pace and I pace in C29
Call it villainy, max security
While I eat that food, sleep that sleep
Miss that kiss, feel real cheap
Swallow the pills, forget all the thrills
No more bills, it's a crime, cell 29
Feeling fine rhymes on cell 29
Can't wait to fly out of cell 29
Miss the space and the trays
Of wine in cell 29
Call it villainy, max security
Feeling fine rhymes on cell 29