Question

Why axial gland is considerd as a heart of echinoderm?

Answer 1

hey!!

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▪Asterias: An Example of Phylum Echinodermata.

The haemal plexus of the axial gland is regarded as the 'heart' of the haemal system
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Answer 2

hye!

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↪The water vascular system in which functions in the movement of tube feet is a characteristic feature of echinoderms and evidence of its existence has been found in even the oldest fossil forms.

↪It comprises an internal hydraulic system of canals and reservoirs containing a watery fluid.

↪ the system consisting of a sieve plate or madreporite and a ring vessel or water vascular ring that are connected by a frequently calcified vessel called the stone canal.