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What is circulatory system in Echinodermata (closed/open) ?

What is circulatory system in Echinodermata (closed/open) ?

Grade:12th pass

3 Answers

CURIOUS ERA
29 Points
6 years ago
Echinoderms mostly have a circulatory which is reduced and of open type. It is usually called haemal system. There are no pumping vessels or a heart.
DIWAKAR PANDEY
168 Points
6 years ago
Exhinodermata have open type of circulatory system .instead of blood vascular system there is present of haemal and perihaemal system .there is no heart and blood is without respiratory pigment.
Sheetal kumari
106 Points
6 years ago
Hi echinodermata have a open type of circulatory system.instead of blood vascular system there system is called haemal system (because the blood does not flow in confined blood vessel)there is no heart present and blood is without respiratory pigment

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