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Phylum Echinodermata

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Anika Kaiser Wahidi

on 17 March 2013

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Transcript of Phylum Echinodermata

Phylum Echinodermata
By Anika Echinodermata: radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers Asteroidea 5 Major Classes Ophiuridea Echinoidea Holothuroidea Chrinoidea Body Structure:
More than 2 cell layers, tissues and organs,
Highly variable
No head
Body cavity a true coelom Type of body symmetry:
Mostly radial
Some bilateral
5-rayed Duetrosome- An animal with a mouth that develops separately from the blastopore, as an echinoderm or chordate. Star Fish Sea urchins Sea Cucumber Strongylocentrotus purpuratus Sea Lillies Reproductive Process:
Normal sexual
Gonochoristic Body Sysytems:
Nervous system includes a circum (esophageal ring)
Has a poorly defined open circulatory system.
Possesses a water vascular system, which operates the tube feet or feeding tentacles.
Without excretory organs. Habitat:
Marine Animals
(ocean) Eating Habits:
Feeds on fine particles in the water, detritus or other animals Interesting Facts: Echinodermatas are Ectothermic (cold blooded)
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