Animals devoid of respiratory, excretory and circulatory organs are

Tapeworms

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Sponges

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Thread worms

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Liver Fluke

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Solution

The correct option is B Sponges
Members of phylum Porifera are commonly known as sponges. These are primitive multicellular animals and have cellular level of organisation. They do not have specialized organs for respiration, excretion and circulation
So, the correct answer is 'Sponges'

Suggest Corrections

Phylum	Level of organization	Symmetry	Coelom	Segmentation	Circulatory system	Digestive system	Respiratory system
???	Organ system	Bilateral	Coelomate	Present	Present	Complete	Absent