Question

Which multicellular organism does not possess an excretory organ?

Answer 1

there are several multicellular organism that does not possess an excretory organ. most of these organisms are Porifera of animalia Kingdom which includes sponges.

Answer 2

• Excretory organs are present inside the body to remove the toxic substances from the body and this helps to maintain the salt and water balance in the organism.
• Excretion helps to maintain the homeostasis of the body.The removal of toxic material is necessary because they are in the form of urea which is not good for our body
• As we go down the phylum we will find excretory organs in the animals but one celled multi cellular organism lacks this organ .Example: Sponges excrete through skin by diffusion
• Another example is Hydra ,it also does not have a excretory organ they excrete  their mouth.  
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