This document discusses plant tissues. There are two main categories of plant tissues - meristematic tissue and permanent tissue. Meristematic tissue consists of undifferentiated cells that can divide repeatedly, while permanent tissue is made up of differentiated cells that carry out specific functions and do not divide. Permanent tissue includes three main types - parenchyma, collenchyma and sclerenchyma tissues. Parenchyma tissue is the most common permanent tissue and can be found in many plant organs. It functions to store nutrients, carry out metabolic processes, and provide structure and turgor pressure to support the plant.

2. A group or collection of similar
cells performing or help to perform
same function and arise from the
same origin are called tissues.
The tissues are of different types
depending on the functions of the
organism, they are mainly of two
categories PLANT TISSUES and
ANIMAL TISSUES.

3. • ◎The cells are made of thin & elastic
cell wall made of cellulose.
• ◎The cells may be round , oval,
polygonal or rectangular in shape.
• ◎They are compact, having no
intercellular space.
• ◎There is a large nucleus and abundant
cytoplasm.
• ◎The protoplasm contains very few or
no vacuoles at all.

4. Plants perform functions which are
different from animals and also their
structure is different , hence they have
tissues which are different from
animals. They are further classified
into many sub categories which is
shown in the table below:

6. • These tissues arise from the
meristematic tissue.
• The cells of this tissue gradually loose
their power to divide and acquire a
definite shape, size and function.
• These tissues may be living or dead.
• There are 2 types of permanent tissues
1. Simple permanent tissue
2. Complex permanent tissue.

7. • This tissue comprises of same type of
cells which perform the same function
and all arise from the same origin.
• There are three categories of simple
permanent tissues:
• Parenchyma
• Collenchyma
• Sclerenchyma.

9. • Characteristics:
a) The cells are living.
b) The cells are thin walled.
c) There may or may not be
intercellular spaces.
d) They are the most
unspecialized cells.
e) No depositions are seen,
the cell wall consists only
of cellulose.
f) There is a prominent
nucleus, cytoplasm &
vacuoles.

10. • There are some special types of parenchyma
tissues :
• Storage parenchyma : The cells enlarge to
store nutrients & water.
• Aerenchyma : Air cavities are present in the
parenchyma tissue to provide buoyancy to
the aquatic plants.
• Chlorenchyma : These parenchyma cells have
presence of chlorophyll & hence can perform
the function of photosynthesis.
Parenchyma tissue is found generally in all
parts of the plant body. It forms the Ground
tissue in leaves, stem, roots & fruits etc.

11. a) To store materials such as starch,
proteins, hormones etc and waste
products such as gum, tannin, resin etc.
b) Parenchyma cells perform the metabolic
activities of the plant.
c) Forms the packaging tissue between the
specialized tissue.
d) By providing turgidity , they provide
mechanical strength.
e) Chlorenchyma helps in performing
photosynthesis.

14. • The major difference is that the cells of
meristematic tissue divide repeatedly while the cells
of permanent tissue have no such ability.
• The cells of permanent tissue are derived from the
meristematic tissue.
• Permanent tissue is made up with differentiated
cells from the meristematic cell, but the cells of
meristematic tissues remain undifferentiated.
• The cells of meristematic tissue are small and have
a similar structure with thin cell.