The fates of the various coelomic compartments vary among echinoderms, but some features seem broadly similar and may reflect a common evolutionary origin deep within the phylum: left mesocoel gives rise to most or all of the water vascular system, and one or both somatocoels form the lining of the body cavity. Body is flattened star shaped with five arms; They possesses tube feet with a sucker; Presence of calcareous plates and movable spines. Echinodermata comes from the term echino which means "spiny" and derm derives from the root "skin" so therefore, the phylum echinodermata means "spiny skin" What is the common name for echinodermata? AnswerStar fish is the common and improper name for a sea star. Characteristics of Echinodermata.

Let us study them further. Description: Echinoderm is the common name given to any member of the phylum Echinodermata (from Ancient Greek, ἐχῖνος, echinos – "hedgehog" and δέρμα, derma – "skin") of marine animals. The water vascular system present in echinoderms accounts for gaseous exchange, circulation of nutrients and waste elimination. This phylum exclusively lives in the oceans.

All the animals in Phylum Echinodermata exhibit spiny skin and hence are grouped together.

The content and activities in this topic will work towards building an understanding of the phylum Echinodermata. Phylum Echinodermata. The name Echinodermata comes from the Greek word for ‘spiny skin,’ and if you look closely at a member of the phylum, you’ll see that the name is more than appropriate. They are invertebrates in the phylum echinodermata. Fossils to ID 2016 - Set B.doc 4 of 8 12/4/2015 12:54:00 PM Phylum: Echinodermata Class: Blastoidea Common Name or members: blastoids Habitat: Marine Periods of Existence: Silurian through Permian Description: Blastoids were small, stalked filter feeders that lived attached to the sea floor. In one form or another, all echinoderms are covered in some form of bumps (starfish), spikes (sea cucumbers), or spines (sea urchins). It originated from Ancient Greek, echinos - “hedgehog” and derma - “skin”. The name Echinodermata comes from the Greek word for ‘spiny skin,’ and if you look closely at a member of the phylum, you’ll see that the name is more than appropriate. They are sticky and help them move. … Echinodermata are so named owing to their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”), and this phylum is a collection of about 7,000 described living species. The water vascular system present in echinoderms accounts for gaseous exchange, circulation of nutrients and waste elimination. An ambulacral system stretches though all of the extensions of an echinoderm and operates the echinoderm’s feet.


Echinoderm is the common name for any member of the phylum Echinodermata. The correct name is a sea star because sea stars are not fish. They usually show a superficial five-part radial symmetry, and generally are equipped with peculiar tube feet (discussed below). This phylum contains marine deuterostome animals. Since echinoderms live only in water, their ambulacral systems -- internal tubes consisting of water-filled vesicles -- are extremely important. An interesting feature of the phylum Echinodermata is that all the organism belonging to this phylum are marine. The body actually consists of five equal segments, each containing a duplicate set of various internal organs.