MP Board · Class 9 · Science · TissuesDifferentiate between parenchyma, collenchyma, and sclerenchyma tissues on the basis of their cell wall structure, intercellular spaces, and primary functions.

Parenchyma, collenchyma, and sclerenchyma are three types of simple permanent plant tissues with distinct characteristics:

1. Parenchyma: Consists of living, unspecialized cells with thin cell walls composed of cellulose. Intercellular spaces are large and prominent. Its primary functions are providing basic support to the plant and storing food and nutrients.
2. Collenchyma: Made of living cells with localized cell wall thickenings made of pectin and cellulose at the corners. Intercellular spaces are very small or absent. It provides mechanical support and flexibility to young plant organs, allowing easy bending without breaking.
3. Sclerenchyma: Composed of long, narrow, dead cells with extremely thick cell walls lignified with lignin. Intercellular spaces are completely absent. Its primary function is providing structural strength, rigidity, and stiffness to plant parts.