What system of the echinoderms enables them to move about?
1 Answer
Nov 6, 2017
The water vascular system allows locomotion in echinoderms.
Explanation:
Echinoderms are marine organisms characterised by pentaradial symmetry (star shaped ) in the adult stage of their life cycle.
The water vascular system is a hydraulic system used by echinoderms for locomotion. The system is composed of canals connecting numerous tube feet. Echinoderms 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.
The movement is slow but powerful.
The water vascular system is also called the ambulacral system.
