What are 3 Layers of Cell Wall ?

The plant cell wall is composed of three major layers: 

1. Middle lamella
2. Primary cell wall
3.  Secondary cell wall

Middle Lamella

• Middle Lamella Is the outermost layer of the cell wall which is present between two cells and serves the purpose of holding the cells together.
•  It is made up of calcium and magnesium pectate.  

Primary cell wall

• Primary cell wall is a thin and flexible layer which is present between the middle lamella and the plasma membrane. It is capable of growth and expansion. 
• It is made up of cellulose  microfibrils, pectic polysaccharides and matrix protein and soluble protein.  

Secondary Cell Wall

• Secondary Cell Wall is found only in mature cells like tracheids, vessels, fibers, etc and  is present between the primary cell wall and the plasma membrane.
•  It is composed of cellulose and hemicellulose.

Also Check – 11 Difference between Cell Wall and Cell Membrane (Plasma Membrane)
Also Check – 3 Layers of Cell Wall
Also Check – 11 Difference between Cell Wall and Cell Membrane (Plasma Membrane)
Also Check – Parts of Plant Cell – Location , Structure and Functions

Also Check – 12 Important Cell Wall Function