Download article as a PDF. Civil rights are the rights of individuals to receive equal treatment (and to be free from unfair treatment or discrimination) in a number of settings -- including education, employment, housing, and more -- and based on certain legally-protected characteristics.ownload article as a PDF. Civil rights are the rights of individuals to receive equal treatment (and to be free from unfair treatment or discrimination) in a number of settings -- including education, employment, housing, and more -- and based on certain legally-protected characteristics.
Cell wall. Definition. noun, plural: cell walls. A membrane of the cell that forms external to the cell membrane whose main role is to give cells rigidity, strength and protection against mechanical stress. It is found in cells of plants, bacteria, archaea, fungi, and algae. Animals and most protists do not have cell walls. Supplement.
The cell wall is a tough, flexible and sometimes rigid layer that surrounds some types of cells. It surrounds the cell membrane and provides these cells with structural support and protection. In addition, the cell wall acts 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, fungi and prokaryotic cells but not in mycoplasmas. The secondary cell wall, a thick layer formed inside the primary cell wall after the cell is fully grown. 2  It is not found in all cell types. 3  Some cells, such as the conducting cells in xylem, possess a secondary wall containing lignin, which strengthens and waterproofs the wall.