Page 29 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

different types of plant tissues. Let's observe these tissues through
a microscope.
Observe the structure of a plant stem and prepare a note based on
your observations. Identify the tissues observed with the help of
Figure 2.2.

collenchyma

parenchyma

sclerenchyma
phloem
xylem

10 x
Fig. 2.2
45 x
Structure of a plant stem

Analyse the information given below and try to understand more
about plant tissues.
Plant tissues

Parenchyma

$ composed of cells with the simplest structure.
$ seen in the soft parts of the plant.
$ helps in photosynthesis and the storage of food.

Collenchyma

$ composed of cells that are thick only at the corners of
the cell wall.
$ provides flexibility and support to plant parts.

Sclerenchyma

$ composed of cells that are uniformly thick all over
the cell wall.
$ provides strength and support to plant parts.

28 Basic Science VIII