Compare the water transport (vascular) system of poriferans and the echinoderms.
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The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration.
The system is composed of canals connecting numerous tube feet. They move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract.
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the system is composed of canals connecting numerous tube feet. In echinoderms there is water vascular system and in poriferans there is water transport system. both are different so you can't give its answer both . it will be wrong . due to presence of tube feet water flows in vascular manner in echinoderms
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