TISSUE- SIMPLE PERMANENT TISSUE

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

3. 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.

4. TYPES OF PERMANENT TISSUE SIMPLE PERMANENT TISSUE COMPLEX PERMANENT TISSUE

5. SIMPLE PERMANENT TISSUE THESE PERMANENT TISSUE ARE KNOWN AS SIMPLE ERMANENT TISSUE BECAUSE THEY ARE COMPOSED OF SIMILAR TYPE OF THE CELL W HICH HAVE COMMON ORIGIN AND FUNCTION.

6. TYPES OF SIMPLE PERMANENT TISSUE PARENCHYMA COLLENCHYMA SCLERENCHYMA

7. PARENCHYMA

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

9. 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.

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

11. COLLENCHYMA

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

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

14. SCLERENCHYMA

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

16. TYPES FIBRES SCLEREIDS

17. ABOUT FIBRES AND SCLEREIDS

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

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