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2015/01/24

MONTESSORI ZOOLOGY : Body Functions of Porifera



Movement

 They move by means of flagella, whip-like organs.


Respiration

There is no specialized organs.



Protection

The skin is many celled and undifferentiated.


Support

The skeleton of the sponge is what we are 
most familiar with. It is a hard calcareous or 
siliceous skeleton with spicules or spongin.

Related image

Circulation

 There is no specific organ for circulation.
All the cells lay at the surface and
interact directly with the environment.


Reproduction

 Reproduction is asexual.
The cells merely divide.


    

 Pinegreenwoods Montessori
Montessori Zoology