0
Echinoderms are characterized by radial symmetry, several arms (5 or more, mostly grouped 2 left - 1 middle - 2 right) radiating from a central body (= pentamerous). The body actually consists of five equal segments, each containing a duplicate set of various internal organs. They have no heart, brain, nor eyes, but some brittle stars seem to have light sensitive parts on their arms. Their mouth is situated on the underside and their anus on top (except feather stars, sea cucumbers and some urchins).
Echinoderms have tentacle-like structures called tube feet with suction pads situated at their extremities. These tube feet are hydraulically controlled by a remarkable vascular system. This system supplies water through canals of small muscular tubes to the tube feet (= ambulacral feet). As the tube feet press against a moving object, water is withdrawn from them, resulting in a suction effect. When water returns to the canals, suction is released. The resulting locomotion is generally very slow.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What is a characteristic of Echinoderms?
Invertebrate animals with spikes and spines all over their bodies.
System that allows echinoderms to move eat and breathe?
Echinoderms do not have a respiratory system similar to a person's. Instead, they have a water vascular (otherwise known as "ambulacral") system, made up of a network of canals to move water. This method accounts for the creature's gas exchange, feeding, and locomotion. Because of this characteristic, echinoderms lack gill slits.
What kingdom are echinoderms in?
Echinoderms are in the Animalia kingdom.
Ecological relationship of echinoderms to other organisms?
echinoderms
Echinoderms are parasitic or not?
As of yet, there is no known species of parasitic echinoderms.
What is the scientific name for Echinoderms?
The scientific name for Echinoderms is Echinodermata.
Do echinoderms live in salt water?
Yes Eventually echinoderms do live in water.
Which group of invertebrates have a water vascular system and tube feet?
Echinodermates possess a water vascular system.
How do echinoderms raise their young?
Echinoderms are born as zooplankton. There is no parental care.
In what environment do all echinoderms live?
Echinoderms live only in the sea.
Are crabs echinoderms?
yes crabs are echinoderms because they have spiny skin
Do Echinoderms have backbone?
No not all Echinoderms have backbones like the starfish
