Page 30 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

Vascular tissues

The water and minerals absorbed by roots need to be transported to
leaves and the food prepared in leaves need to be transported to different
parts. The specialized tissues formed from peculiar cells to do this are
called vascular tissues. They are called complex tissues because they
are formed from different kinds of cells. The two types of complex tissues
found in plants are xylem and phloem.
Xylem
$ tubes formed from elongated cells.
$ transports water and minerals absorbed by the roots to the leaves.
$ has thick cell walls and therefore provide support and strength to
the plant.
Phloem

$ composed of tubular inter-connected cells.
$ transports food synthesized in the leaves to various parts of the
plant body.

Xylem Phloem
Fig 2.3

Now you have understood the different types of plant tissues and their
characteristics. Complete the following worksheet based on the hints given
below.
A. transports food prepared in the leaves to various parts of the plant.
B. transports water and minerals absorbed by the roots to the leaves.
C. seen in the tender parts of the plant.

D. only the corners of the cell walls are thick.
E. cells that are uniformly thick allover the cell wall are seen.

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