Bushings are one of those things that most people don't really think about until they find out they have a $600 mechanic's repair bill on their hands. Some even think the mechanic is trying to rip them off when they mention bushings needing replaced.
Lignin is a phenolic compound, chemically related to benzene. The cell walls of fungi are diverse among the taxonomic groups, but most contain chitin microfibrils embedded in a polysaccharide matrix and covered with a loose coating of additional molecules combining sugars and peptides (amino acid chains).
Cell wall is found on most plant cells and fungi.Cell wall in these cells covers the cell membrane and protects it(in addition to performing several other functions-like providing mechanical strength).Cell wall in plant cells is made of cellulose,pectin,lignin and suberin while that of fungi is made of chitin.his helps enclose the cell organelles and cytosol inside the cell. the cell membrane also helps in the transfer of ions etc across from the inside to the outside of the cell as well as from the outside to the inside of the cell. a cell wall is a protective covering and it surrounds the cell membrane.