Movement
They move by means of flagella, whip-like organs.
Respiration
There is no specialized organs.
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.
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
