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Fact of the Day: Sponges Are Unique

Fact of the Day: Sponges Are Unique

Did you know that the sponge is the only multicellular animal without a nervous system?

 

 

Sponges are the only multicellular animals without a nervous system. They do not have any nerve cells or sensory cells. However, touch or pressure to the outside of a sponge will cause a local contraction of its body. The hydra has a nervous system characterized by a nerve net.

 

 

Do you know any other fun facts? Send it to our editors and we’ll make it into a Fact of the Day for the #Nonitribe.

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