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Echinoderms
Echinoderms are marine animals with radial symmetry. Some types of echinoderms are sea stars, sea urchins, sand dollars, and sea cucumbers.
294 Questions
What is an echinoderm that has a large number of spines attached to it?
The sea urchin is a member of the phylum Echinodermataand is covered with spines that may or may not be poisonous.
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 As the tube feet press against a moving object, water is withdrawn from them, resulting in a suction effect.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.
therefore, no. hydra supposedly had heart, brain and eyes and also do not have tentacles.
No, it's a Cnidarian
No because an echinoderm is any marine animal of the invertebrate phylum Echinoderm, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea urchins, sea cucumbers, etc.
How long have echinoderms been on earth?
They have been around since the Cambrian Period and a lot of them are extinct.
Do starfish take care of the young?
No. The female releases a large quantity of microscopic eggs out into the water to be fertilized by the male externally. The babies, known as larvae, take about 2-5 years to grow. In all this time, they are not cared for by their parents.
None of the above. Echinoderm refers to a member of the animal phyla Echinodermata, the sister taxon to our own phyla, Chordata.
Do echinoderms have a closed circulatory system?
All vertebrates have closed circulatory systems, meaning that the blood never travels outside of a system of veins, arteries and capillaries.
What is the structure called on an echinoderm that operates much like a living suction cup?
The tube foot
How is an adult echinoderm different from a echinoderm larva?
There is no such thing as an "adult larva" , a larva is always immature ( a "baby"). If you mean "how is a sponge larva different from and adult sponge?" The answer is:
1. The larva is almost microscopic. You can't really see it with your bare eye.
2. the larva swims around. an Adult sponge stays attached to a surface for its lifetime and can't swim
Do Echinoderms live in Deep water or Shallow water?
Seahorses tend to like Shallow Waters More than Deep Waters
Why are echinoderms more closely related to humans than jellyfish?
Actually, echinoderms are more closely related to humans than molluscs.
What phylum is an echinoderm in?
Echinoderms are the phylum. The phylum is Echinodermata Echinoderms are the phylum. The phylum is Echinodermata Echinoderms are the phylum. The phylum is Echinodermata
starfish poop the same way that they eat, and that is by making their stomach go inside out.
Where can one purchase Starfish earrings?
There are many places one can purchase Starfish earrings. One can purchase them online from Amazon or eBay or Etsy. One may also want to check out jewelry stores such as Claire's.
What surface is the madreporite of a starfish visible?
aboral!!!!!
i hate stupid people who get on here and answer things wrong!!!
How many radial canals does the starfish have?
The radial canals carry water to the ampullae and provide suction to the tube feet.
