Tissues in Plants and Animals


   
 
Meristematic Tissues (Meristems)
Nature
These are composed of cells that are dividing continuously
 
The cells are spherical, oval, polygonal or rectangular.
 
The cell wall is thin and made up of cellulose.
 
The cells are closely arranged without inter-cellular spaces.
 
Cytoplasm is abundant and nuclei are large.
 
Vacuoles are absent and if present, very few.
 
Occurrence
Found in growing tips of root and shoot.
 
Found in the vascular cambium of dicot trees just beneath the bark. They are responsible for the increase in diameter of the stem.
 
Function
The main function of meristematic tissue is to continuously form a number of new cells and help in growth.
 
               
 
Sections through (a) stem apex and (b) root tip showing meristematic tissue
 
 
 
 
     
   
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