WITH MISS RITIMA

1. TISSUE
LEC-2
BY: MISS RITIMA
( YOU TUBE CHANNEL : SHORT SHOT BIOLOGY
FOLLOW @ SLIDE SHARE APP- MISS RITIMABIOLOGYEXP)

2. PERMANENT
TISSUE

4. PERMANENT TISSUE
• PERMANENT TISSUE POSSESS
DEFINITE SHAPE, SIZE AND FUNCTION.
THEY HAVE LOST THEIR POWER OF
DIVISION.
• THE PERMANENT TISSUE MAY BE
LIVING OR DEAD .
• THE LIVING PERMANENT CELLS ARE
LARGE AND USUALLYPOSSESS THIN
WALLS ENCLOSING VACULATED
CYTOPLASM.
• THE DEAD PERMANENT CELLS ARE
USUALLY THICK WALLED WITHOUT
CYTOPLASM.

5. TYPES OF PERMANENT
TISSUE
• SIMPLE PERMANENT TISSUE
• COMPLEX PERMANENT TISSUE

6. SIMPLE PERMANENT
TISSUE
• THESE PERMANENT TISSUE ARE
KNOWN AS SIMPLE ERMANENT
TISSUE BECAUSE THEY ARE
COMPOSED OF SIMILAR TYPE OF
THE CELL WHICH HAVE COMMON
ORIGIN AND FUNCTION.

7. TYPES OF SIMPLE
PERMANENT TISSUE
a. PARENCHYMA
b. COLLENCHYMA
c. SCLERENCHYMA

8. PARENCHYMA

9. CHRACTERISTICS
a. THEY ARE THIN WALLED CELLS.
b. THEIR SHAPE MAY BE
ISODIAMETRIC, SPHERICAL,
OVAL ,CYLINDRICAL,
RECTANGULAR.
c. IT FORMS BASIC PACKING
TISSUE OF THE PLANT BODY.

10. TYPES
STORAGE PARENCHYMA
THESE ARE ENLARGED
PARENCHYMATOUS CELLS TO STORE
NUTRIENTS AND WATER.
AERENCHYMA
IT IS PRESENT IN AQUATIC PLANTS AND
PROVIDE BOUYANCY TO THEM.
CHLORENCHYMA
IT IS PARENCHYMATOUS CELLS THAT
CONTAIN CHLOROPLAST AND HELPS IN
THE PROCESS OF PHOTOSYNTHESIS.

11. FUNCTIONS
a. STORAGE OF RESERVE FOOD
MATERIAL LIKE STARCH , FATS ,
PROTEINS etc.
b. THEY ALSO STORE WASTE
PRODUCTS LIKE TANNIN, GUM,
RESINS etc.
c. PROVIDE RIGIDITY TO PLANT
BODY.
d. CHLORENCHYMA HELPS IN
PHOTOSYNTHESIS.
e. PROVIDE MECHANICAL STRENGTH.

12. COLLENCHYMA

13. CHRACTERISTICS
a. IT IS LIVING TISSUE.
b. THE CELLS ARE THIN WALLED BUT
POSSESS THICKENINGS OF
CELLULOSE AND PECTIN
SUBSTANCES AT CORNERS.
c. THE CELLS ARE COMPACTLY
ARRANGED AND INTERCELLULAR
SPACES ARE ABSENT.
d. IN TRANSVERSE SECTION THEY
APPEAR CIRCULAR , OVAL OR
POLYGONAL.

14. FUNCTIONS
a. IT PROVIDE MECHANICAL
SUPPORT , ELASTICITY AND
TENSILE STRENGTH TO THE
PLANT BODY.
b. COLLENCHYMATOUS CELLS
MANUFACTURE SUGARS AND MAY
STORE IT AS A STARCH.
c. THE COLLENCHYMA PRESENT AT
THE MARGINS OF LEAVES AND
RESIST THE TEARING EFFECT OF
THE WIND.

15. SCLERENCHYMA

16. CHRACTERISTICS
a. IT IS DEAD TISSUE.
b. THE WALLS ARE THICK DUE TO
DEPOSITION OF LIGNIN.
c. CELLS ARE CLOSELY PACKED
WITHOUT INTERCELLULAR
SPACES.
d. THE CELLS ARE CEMENTED WITH
THE HELP OFTHE MIDDLE
LAMELLA. IT IS MADE UP OF
PECTIN , LIGNIN AND PROTEIN.

17. TYPES
• FIBRES
• SCLEREIDS

18. ABOUT FIBRES AND
SCLEREIDS

19. FUNCTION
a. SCLERENCHYMA GIVES
MECHANICAL SUPPORT TO
PLANT.
b. IT PROVIDES A PROTECTIVE
COVERING ROUND SEEDS AND
NUTS.
c. SCLERECHYMA FIBRES OF SOME
PLANTS LIKE FLAX , HEMP ,
JUTE , COCONUT ARE OF
COMMERCIAL IMPORTANCE.

20. THANKS
FOR
WATCHING