Grade 12th passZoology

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

cvs Chaitanya

8 Years agoGrade 12th pass

3 Answers

CURIOUS ERA

8 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

8 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

8 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