1. Science Symposium
On The Topic:
TISSUES

2. Tissues
The group of cells that are similar in shape and
together are called Tissue.
Tissues are broadly classified into two types:
[1] Plant Tissue [2] Animal Tissue

3. Plant Tissue
Meristematic Tissue
The cells of this tissue are always dividing.
PROPERTIES:
1)The cells are small and metabolically very active.
2)Have dense Cytoplasm and thin cell wall with prominent nucleus
3)They don’t have vacuole.
They are classified into three types:
1)Apical Meristem
2)Intercalary Meristem
3)Lateral Meristem

4. Diagrams

5. Permanent Tissue
Permanent Tissue
The tissue formed after differentiation in Meristematic tissue is called
permanent tissue. It is of two types:
1]Simple Permanent Tissue
2]Complex permanent tissue

6. Permanent Tissue
Permanent
Tissue
Simple
Permanent
Tissue
Complex
Permanent
Tissue
Xylem
Phloem
Parenchyma
Collenchyma
Sclerenchyma

7. Simple Permanent Tissue
The permanent tissue which is made up of only one kind of cells
is called simple permanent tissue.
It is of following types:
1. Parenchyma- These are living cell with thin cell wall and are loosely
packed with lots of intercellular spaces.
2. Collenchyma- These are living cells. They have irregular thickening at their cell wall and
hence have less intercellular space.
3. Sclerenchyma-These are dead cells with excessive thickening at their cell wall hence have
no intercellular spaces.

8. Epidermis
Epidermis is the outermost layer of plant
parts. It is usually made
up of a single layer of parenchyma cells.
Functions
i.
ii.
iii.
iv.
It aids in protection against parasites.
Small pores are present in the
epidermis of leaves and are called
stomata. They are necessary for
exchange of gases.
Epidermal cells of root increase the
absorptive surface area.
In desert plants, epidermis has a thick
waxy coating of Cutin to prevent
transpiration.

9. Cork
A layer of lateral meristem replaces the epidermis of stem.
Cells on the outside are cut off from this layer. This forms the several layer thick cork of the tree.
Its cells are arranged compactly with no intercellular spaces.

10. Complex Permanent Tissue
The tissue made up of more than one type of cells is called Complex
Permanent Tissue. Its types are:
1] Xylem
2] Phloem

11. Xylem
This tissue is responsible for the conduction of water and
minerals
from root to various plant parts.
It consists of following elements:
i.
Tracheid
ii.
Vessels- they are tubular structure
iii.
iv.
Xylem parenchyma- it stores food and conducts
water sideways
Xylem Fibres- they are mainly supportive in function

12. Phloem
This tissue is responsible for the conduction of food from leaves to
various plant parts.
It consists of following elements:
i.
Sieve cell
ii. Companion cell
iii. Phloem Parenchyma
iv. Phloem fibre

13. Diagrams

14. Animal Tissue
Animal
Tissue
Epithelial
Tissue
Connective
Tissue
Muscular
Tissue
Nervous
Tissue

15. Epithelial Tissue
This tissue forms the covering of most internal organs and
cavities within the body. They are generally single layer arranged
on a basement membrane. Depending upon the shape of cells, they
are of following types
1. Squamous
2. Cuboidal
3. Columnar
4. Ciliated Columnar
5. Glandular
6. Stratified

16. Connective Tissue
Blood:
The liquid part of blood is called plasma. It is 90% water, contains
Various ions, hormones, digested food and waste materials
The cellular part contains RBC(Red Blood Cells)-contains red pigment
Called Haemoglobin, WBC(White Blood Cells)-fight against diseases and Blood Plateletsresponsible for clotting.
Bones and Cartilage
Tendon and Ligament
Areolar and Adipose

17. Muscles
S.
No.
Striated
Non-Striated
Cardiac
1
Muscle cells have
alternate dark and light
bands called Striations.
Muscle cells do not
have any striations.
Striations are
prominent but not
very prominent.
2
Cells are unbranched,
multi-nucleated with
blunt ends.
Cells are unbranched,
uninucleated with
tapering ends.
Cells are
uninucleated with
blunt ends.
3
They are voluntary
muscle.
They are involuntary
muscle.
They are
involuntary muscle
4
They are found in
skeleton.
They are found only in
heart.
They are found in
all internal organs
except heart.

18. Diagrams

19. Thank You
Science
Symposium