Simple tissues Flashcards
(24 cards)
Types of simple permanent tissue
Parenchyma, collenchyma and sclerenchyma
__________tissue forms the major component within organs
Parenchyma
Shape of parenchyma cell
generally isodiametric
There are many shapes but most of them are isodiametric
They may be
* spherical
* oval
* round
* polygonal
* elongated in shape
Cell wall of parenchyma cells made up of
Cellulose
There wall are thin and made up of cellulose
Their wall are thin and made up of cellulose
they may either be closely packed or have small intercellular space
Function of parenchyma cells
Photosynthesis , storage and secretion
The ________occurs in layer below the eperdermis in most od the dicotyledonous plants.
Collenchyma
In what condition collenchyma cells are found
They found as a homogeneous layer or in patches
Why collenchyma cells are thick at the corners
hemicellulose , cellulose and pectin
Collenchyma cells are thick at the corners due to hcp
Collenchyma cells are thick at the corners due to hcp
* hemicellulose
* cellulose
* pectin
Collenchyma cell have chloroplast?
Often contain chloroplast
Shape of collenchyma cells
may be oval spherical or polygonal
In which condition collenchyma cells assimilate food
When collenchyma cells have chloroplast
In which tissues cell didn’t have intercellular space
collenchyma
Function of collenchyma cells
They provide mechanical support
They provide mechanical support to the growing part of the plant sunch as young stem and a petiole of a leaf
Which tissue’s cells are useually dead and without protoplast
Sclerenchyma
Which tissue’s cells have numerous pits
sclernchyma
Sclerenchyma consist of _____ of cells
Long and narrow cells with thich and lignified cell walls
Long and narrow cells with thich and lignified cell walls having few mumerous pits
On which basis
Sclerenchyma may be either fibers or sclereids
On the basis of variation in form , structure , orgin and development .
On the basis of variation in form , structure , orgin and development Sclerenchyma may be either fibers or sclereids.
Fibres sclerenchyma cells
The fibers are thick walled elongated and pointed cells , generally occur in groups , in various part of the plants
The sclerids Sclernchyma simple permanent tissue
They are spherical ,oval or cylindrical, highly thickened with narrow cavities (lumen)
Sclereids are found
In the fruit walls of nut , pulp of fruits like guava and sapota : coats of legumes and leaves
Function of sclernchyma
Provide mechanical support to organ
Which one is more thicker
Fiber or sclereid
sclereid
Found below the epidermis
Collenchyma
Legnied but dead
Sclerenchyma
