write a short note on echinoderms
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Echinodermata is originated from 2 greek words , echinos meaning hedgehog and derma means skin son it means organism having spines in their body.
These are free living marine animals.
They are triploblastic and have a coelomic cavity.
They have water driven tube system for movement.
They have hard calcium carbonate structure that they use as a skeleton.
Examples are starfish and sea urchins.
These are free living marine animals.
They are triploblastic and have a coelomic cavity.
They have water driven tube system for movement.
They have hard calcium carbonate structure that they use as a skeleton.
Examples are starfish and sea urchins.
tamilchezhiyan:
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Answer:
Echinodermata :
# these are exclusive Marine animal.
# they are triploblastic.
# they have true ceolom.
# body is uniquely shaped , it can be elongated and spherical.
# body is unsegmented without head.
# respiration occurs through gills.
# tube feet help in locomotion.
# sexes are separate.
# host part can be regenerated.
# body surface is covered with calcareous spicules.
# Example - starfish , sea lily , brittle star etc.
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