1. Madhyaparda: Madhyaparda is composed of pectic acid (more), calcium pectate, magnesium pectate, propectin etc.
2. Primary wall: Primary wall is composed of cellulose, hemicellulose, glycoprotein, xyloglucan etc.
3. Secondary wall: Secondary wall is composed of cellulose, lignin, suberin, cutin, tannin, wax, calcium oxalate etc. Hemicellulose contains xylan, araban and galactan. Hemicellulose called xyloglucan acts as a crosslink in the cell wall structure.
Cell wall consists of 40% cellulose, 20% hemicellulose, 30% pectin and 10% glycoprotein. The cell walls of higher plants contain cellulose and polysaccharides, the cell walls of bacteria contain peptidoglycan and mucoproteins, the cell walls of fungi contain chitin, the cell walls of algae contain polysaccharides and glycoproteins, the cell walls of diatoms contain silicic acid and the cell walls of archaea contain glycoproteins, pseudopeptidoglycans and polysaccharides.