Water vascular system is the unique character of
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Water vascular system is unique feature of Echinodermata
where Sponges ( poriferans) have water canal system.
where Sponges ( poriferans) have water canal system.
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Water vascular system have unique feature of transfer of water.
This also have :
1. Flow of water in one direction only.
2. Its cells are also lignified.
This also have :
1. Flow of water in one direction only.
2. Its cells are also lignified.
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