The classes of Echinoderms
The phylum echinoderms is divided into five extant classes: Asteroidea (sea stars), Ophiuroidea (brittle stars), Echinoidea (sea urchins and sand dollars), Crinoidea (sea lilies or feather stars), and Holothuroidea (sea cucumbers).
taken from:https://www.boundless.com/biology/textbooks/boundless-biology-textbook/invertebrates-28/superphylum-deuterostomia-170/classes-of-echinoderms-660-11881/
Echinoderms are members of the phylum Echinodermata, from the Greek words for “spiny skin.” This group of marine animals lives only in salt water and includes sea lilies, brittle stars, sea cucumbers, sand dollars, sea urchins, and starfish. Though not all echinoderms actually have spiny skin, in most cases it does have a very rough texture, and some species also wield toxic spines as a defense mechanism. These complex invertebrates possess many distinctive features, but here are five cool facts common to the group as a whole.
taken from:http://aquaviews.net/explore-the-blue/5-cool-facts-echinoderms/
Echinoderm Facts 1: definition of echinodermCan you define echinoderm in simpler words? This animal is included in an invertebrate animal. It has the internal skeleton with a water vascular system.
Echinoderm Facts 2: habitatIt is very impossible to find echinoderm is fresh after area. Their habitat is in salt water. You need to go to the sea to find out echinoderm.
Echinoderm facts
Echinoderm Facts 3: types of echinodermThere are several types of echinoderm. Some of them include sea cucumbers, brittle stars, sea stars, and sea urchins.
Echinoderm Facts 4: symmetryYou can find out a unique feature in echinoderm by seeing on the shape of the body. All types of echinoderms that you find on the sea are in radial symmetrical body. It means that they have a central point with many lines of symmetry.
Echinoderm Fromia monilis
Echinoderm Facts 5: bloodAs I have stated before, echinoderm has not blood in the body. The function of blood in echinoderm is replaced by the water vascular system.
Echinoderm Facts 6: tube feetThe location of the feet in echinoderm is very unique. You can see them along the arms of the animal. The feet are called tube feet. The function is to capture prey, move, and cling the surface.
Echinoderm purple urchin
Echinoderm Facts 7: predatorsEven though echinoderm has cute appearance, you should near be mistaken by thinking that all echinoderms are weak animals. They are predators. The tube feet of sea star will be used to grip the prey such as oysters and clams.
Echinoderm Facts 8: sea starsOne of the members in echinoderms that you can see on the sea shore is sea star. This animal has eyespot. The eyes are used by sea star to detect the dark and light.
Echinoderm Sea Star
Echinoderm Facts 9: Sea CucumbersSea cucumbers have a different projection when they feel threatened by other animals. They will fling the internal organ to the predators. The sea cucumbers have the ability to replace the lost organ.
Echinoderm Facts 10: sea urchinOne of the edible echinoderms is sea urchin. In many countries in Europe or Asia, people love to enjoy their food created from sea urchin. Do you like it?
echinoderm
I have stated that all echinoderms can be found living in salt water. if you place a sea cucumber inside the fresh water, it will explode. Are you fascinated with facts about
taken from:http://www.myinterestingfacts.com/echinoderm-facts/
) Class: Asteroidea--Starfish or Sea Stars (Six-rayed Starfish--Leptasterias hexactis)--sea stars have fairly developed senses of smell, touch, and taste. They also can respond to the presence of light. They normally eat small prey whole, but they have to extrude their stomachs to digest larger prey outside their bodies. Sometimes, sea stars will use their tube feet to help pry open bivalves, and then they will slip their stomachs in between the two shells.
Six-rayed Starfish--Leptasterias hexactis
(2) Class: Ophiuroidea--Brittle Stars (Daisy Brittle Star--Ophiopholis aculeata)
Another picture of a Brittle Star (*)--found in all oceans (but mainly in the tropics). The group includes about 2000 species, varying in color. They eat decaying matter and microscopic organisms that are found on soft muddy bottoms.
Brittle Stars (Daisy Brittle Star--Ophiopholis aculeata)
(3) Class: Echinoidea--(*) Sea Urchins--they locomote using short to long, movable spines. Between their spines are small, pincerlike organs called pedicellariae which they use to clean and defend themselves. The pedicellariae also contain a powerful toxin.
Strongylocentrotus franciscanus - Red Sea Urchin
(4) Class: Crinoidea--Feather Stars (Florometra serratissima)--feather stars will swim if they are disturbed.
Feather Stars (Florometra serratissima)-
(5) Class: Holothuroidea--Sea Cucumbers
Parastichopus californicus Stichopodidae 3 Giant red sea cucumber Source:http://www.cyhaus.com/marine/Echinoderm....
fun fact about echinoderms:
Sea Stars have two stomachs, a cardiac and pyloric stomach, and the eversion of the cardiac stomach occurs when the Sea Star wants to feed. They push their stomach out of their body and over the prey, where digestive enzymes break down the break and make transport into the sea star’s body easier.
Sea Stars can regenerate lost limbs through asexual reproduction. Fisherman used to just chop Starfish into peices, hoping to kill them and stop them from eating up the oyster beds, and then throw them back into the ocean. However, they were unaware that Echinoderms can regenerate lost limbs, and this would just increase their population even more, making the issue worse.
Brittle Stars can be found at depths as great as 6000 m.
The anus of a Sea star is located on top of its body.
Echinoderms only live in salt water, and are very sensitive in changes of salinity. If a sea cucumber were placed in fresh water, it would swell up and explode.
taken from:http://w3.shorecrest.org/~Lisa_Peck/MarineBio/syllabus/ch7invertebrates/Invertwp/2007/tj/cool.html
those are the classes of echinoderms hope you liked it !!!!!!!!!
taken from:https://www.boundless.com/biology/textbooks/boundless-biology-textbook/invertebrates-28/superphylum-deuterostomia-170/classes-of-echinoderms-660-11881/
Echinoderms are members of the phylum Echinodermata, from the Greek words for “spiny skin.” This group of marine animals lives only in salt water and includes sea lilies, brittle stars, sea cucumbers, sand dollars, sea urchins, and starfish. Though not all echinoderms actually have spiny skin, in most cases it does have a very rough texture, and some species also wield toxic spines as a defense mechanism. These complex invertebrates possess many distinctive features, but here are five cool facts common to the group as a whole.
taken from:http://aquaviews.net/explore-the-blue/5-cool-facts-echinoderms/
Echinoderm Facts 1: definition of echinodermCan you define echinoderm in simpler words? This animal is included in an invertebrate animal. It has the internal skeleton with a water vascular system.
Echinoderm Facts 2: habitatIt is very impossible to find echinoderm is fresh after area. Their habitat is in salt water. You need to go to the sea to find out echinoderm.
Echinoderm facts
Echinoderm Facts 3: types of echinodermThere are several types of echinoderm. Some of them include sea cucumbers, brittle stars, sea stars, and sea urchins.
Echinoderm Facts 4: symmetryYou can find out a unique feature in echinoderm by seeing on the shape of the body. All types of echinoderms that you find on the sea are in radial symmetrical body. It means that they have a central point with many lines of symmetry.
Echinoderm Fromia monilis
Echinoderm Facts 5: bloodAs I have stated before, echinoderm has not blood in the body. The function of blood in echinoderm is replaced by the water vascular system.
Echinoderm Facts 6: tube feetThe location of the feet in echinoderm is very unique. You can see them along the arms of the animal. The feet are called tube feet. The function is to capture prey, move, and cling the surface.
Echinoderm purple urchin
Echinoderm Facts 7: predatorsEven though echinoderm has cute appearance, you should near be mistaken by thinking that all echinoderms are weak animals. They are predators. The tube feet of sea star will be used to grip the prey such as oysters and clams.
Echinoderm Facts 8: sea starsOne of the members in echinoderms that you can see on the sea shore is sea star. This animal has eyespot. The eyes are used by sea star to detect the dark and light.
Echinoderm Sea Star
Echinoderm Facts 9: Sea CucumbersSea cucumbers have a different projection when they feel threatened by other animals. They will fling the internal organ to the predators. The sea cucumbers have the ability to replace the lost organ.
Echinoderm Facts 10: sea urchinOne of the edible echinoderms is sea urchin. In many countries in Europe or Asia, people love to enjoy their food created from sea urchin. Do you like it?
echinoderm
I have stated that all echinoderms can be found living in salt water. if you place a sea cucumber inside the fresh water, it will explode. Are you fascinated with facts about
taken from:http://www.myinterestingfacts.com/echinoderm-facts/
) Class: Asteroidea--Starfish or Sea Stars (Six-rayed Starfish--Leptasterias hexactis)--sea stars have fairly developed senses of smell, touch, and taste. They also can respond to the presence of light. They normally eat small prey whole, but they have to extrude their stomachs to digest larger prey outside their bodies. Sometimes, sea stars will use their tube feet to help pry open bivalves, and then they will slip their stomachs in between the two shells.
Six-rayed Starfish--Leptasterias hexactis
(2) Class: Ophiuroidea--Brittle Stars (Daisy Brittle Star--Ophiopholis aculeata)
Another picture of a Brittle Star (*)--found in all oceans (but mainly in the tropics). The group includes about 2000 species, varying in color. They eat decaying matter and microscopic organisms that are found on soft muddy bottoms.
Brittle Stars (Daisy Brittle Star--Ophiopholis aculeata)
(3) Class: Echinoidea--(*) Sea Urchins--they locomote using short to long, movable spines. Between their spines are small, pincerlike organs called pedicellariae which they use to clean and defend themselves. The pedicellariae also contain a powerful toxin.
Strongylocentrotus franciscanus - Red Sea Urchin
(4) Class: Crinoidea--Feather Stars (Florometra serratissima)--feather stars will swim if they are disturbed.
Feather Stars (Florometra serratissima)-
(5) Class: Holothuroidea--Sea Cucumbers
Parastichopus californicus Stichopodidae 3 Giant red sea cucumber Source:http://www.cyhaus.com/marine/Echinoderm....
fun fact about echinoderms:
Sea Stars have two stomachs, a cardiac and pyloric stomach, and the eversion of the cardiac stomach occurs when the Sea Star wants to feed. They push their stomach out of their body and over the prey, where digestive enzymes break down the break and make transport into the sea star’s body easier.
Sea Stars can regenerate lost limbs through asexual reproduction. Fisherman used to just chop Starfish into peices, hoping to kill them and stop them from eating up the oyster beds, and then throw them back into the ocean. However, they were unaware that Echinoderms can regenerate lost limbs, and this would just increase their population even more, making the issue worse.
Brittle Stars can be found at depths as great as 6000 m.
The anus of a Sea star is located on top of its body.
Echinoderms only live in salt water, and are very sensitive in changes of salinity. If a sea cucumber were placed in fresh water, it would swell up and explode.
taken from:http://w3.shorecrest.org/~Lisa_Peck/MarineBio/syllabus/ch7invertebrates/Invertwp/2007/tj/cool.html
those are the classes of echinoderms hope you liked it !!!!!!!!!