The document introduces the concept of tissues, defined as groups of similar cells, with histology as the study of tissues. It elaborates on the differences between plant and animal tissues, focusing on meristematic and permanent tissues in plants, including types of meristematic tissues and their functions. Additionally, it describes the characteristics of simple and complex permanent tissues, specifically xylem and phloem.

1. TISSUES-I
CHAPTER-6

2. INTRODUCTION

3. TISSUES
• Tissue is a group of cells having similar origin, structure & function.
• Study of tissues is called Histology
• 2. In unicellular organism (Amoeba), single cell performs all basic functions,
whereas in multi-cellular organisms (Plants and Animals) shows division of
labour as Plant tissue & Animal tissues.

4. DIFFERENCE BETWEEN PLANT &
ANIMAL TISSUE

5. PLANT TISSUE

6. PLANT TISSUES
The Meristems
are the tissues
having the
power of cell
division.
It is found on
those region of
the plant which
grows.
Cells lost capability to divide
Formed from meristematic tissue
after attaining specific function.

7. DIFFERENCE BETWEEN MERISTEMATIC &
PERMANENT TISSUES

8. MERISTEMATIC TISSUE

9. APICAL MERISTEM & LATERAL
MERISTEM

10. TYPES OF MERISTEM
The Apical meristems – It is
present at the growing tip of
the stem and roots and
increases the length.
The lateral meristems -
present at the lateral side of
stem anf root (cambium) and
increases the girth.
The intercalary meristems -
present at internodes or base
of the leaves and increases the
length between the nodes.

11. PERMANENT TISSUE

12. PERMANENT TISSUES
• Cells lost
capability to
divide
• Formed from
meristematic
tissue after
attaining
specific
function.

14. DIFFERENCE BETWEEN SIMPLE PERMANENT &
COMPLEX PERMANENT TISSUE

15. SIMPLE PERMANENT TISSUE

19. COMPLEX PERMANENT TISSUE

23. XYLEM

24. All the other 3
except Xylem
Parenchyma are
dead.
They help in
conduction of water
and minerals and
also provide
mechanical support

26. PHLOEM

29. PHLOEM COMPONENTS
Of all the Phloem components
except Phloem fibres are all
living.
It is through the sieve tubes
that the translocation of sugars
takes place
Companion cells provide
nourishment and support to the
sieve tubes
(NOTE : Sieve tubes are the
only non-nucleated cells in the
plants.)

30. SUMMARY

32. THANK YOU