Q4 of 386 Page 170

What is the difference between parenchyma and collenchyma?

Parenchyma	Collenchyma
The cells are living and thin walled.	The cells are living and thick at corners.
The cells are oval, spherical or polygonal in shape.	The cells are elonged and irregularly thickened at the corners.
There is large, intercellular space between the cells.	There is very little intercellular space between the cells.
It provides support to plants and also stores food.	It provides mechanical support to the plants.

What are tracheary elements? Describe their functions.

Write the functions of parenchyma, collenchymas and sclerenchyma.

What is the difference between collenchyma and sclerenchyma ?

Name the different types of elements found in the xylem.