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Question
Which organ system is lacking in the animals that have a water vascular system?
Which organ system is lacking in the animals that have a water vascular system?
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Solution
The correct option is C Excretory system
Water vascular system is characteristic feature of echinoderms. In echinoderms, a specialised excretory system is absent. The excretory products diffuse out from the body tissue into coelomic fluid from where waste is eliminated out.
Water vascular system is characteristic feature of echinoderms. In echinoderms, a specialised excretory system is absent. The excretory products diffuse out from the body tissue into coelomic fluid from where waste is eliminated out.
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