Each of the following terms has some anatomical significance. What do these terms mean? Explain with the help of line diagrams.
b. Middle lamella
c. Secondary wall
a. Plasmodesmata – A microscopic channels between two cells through the cell wall are called Plasmodesmata.
b. Middle lamella – It is a layer in the cell wall and is made of calcium pectate (mainly) and magnesium pectate.
c. Secondary wall – this is a non-extensible layer. It is made of hemicelluloses. It provides rigidity to the cell.