An exceptional system of echinoderms is ___________________.

Water incurrent canal

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Water vascular system

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Both A and B

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None of the above

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Solution

The correct option is B Water vascular system
The water vascular system is present in the organisms which belong to the group of Echinoderms. It is a characteristic feature found in the Echinoderms. The system is a hydraulic system. This system is used by organisms for respiration, food circulation, waste removal, excretion, and locomotion. The system is composed of canals that can connect the tube feet. They can perform the movement by contracting muscles. The force generated by water into the tube feet. This causes them to extend and push against the ground. The feet are then relaxed to allow the feet to retract.
Thus, the correct answer is option B.

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