What Echinoderms eat
"Because there are different kinds of echinoderms, I have to give an answer that tells something about classes. For example, some echinoderms cannot move -- they're stuck on the bottom of the ocean like a plant is. They eat passively, which means they just wait for bits of dead plants and animals to float down to them and they suck these crumbs in through a hole that they also use to breathe and drink with. Go to "Wikipedia" to get all the details and then go to the section on "Mode of life" and in that part, the section on "feeding." Other kinds can move around, like starfish, and they hunt down other creatures and grab them. Then, they actually squeeze their stomach out through a little hole, which is like a mouth, and ooze out their stomach acids onto the creature they want to eat. So they are digesting their food on the outside, instead of the inside like we do. Another good website is "enchantedlearning" at "ucmp.berkeley" where you
should go to the section on "life history and ecology." They have lots of good pictures"
Taken from. https://answers.yahoo.com/question/index?qid=20080826053445AAb1yMo
should go to the section on "life history and ecology." They have lots of good pictures"
Taken from. https://answers.yahoo.com/question/index?qid=20080826053445AAb1yMo
How do Echinoderms move
"Echinoderms do not have a highly developed nervous system, but they do have a nerve ring that surrounds the mouth and helps to coordinate their movements and responses. Sensory cells on their arms gather information about their surroundings, such as light and temperature to help the organism respond to its environment".
taken from http://studentreader.com/echinoderms/
"Echinoderms are usually found in the shallow water near the shore. They spend much of the time resting in the sand or on rocks. Starfish can move using specialized structures called tube feet. Each arm of the starfish has hundreds of tubes with suckers on them to help them navigate over rocks and sand. The suction of the tube feet is powerful enough to open even the most stubborn clam shell. The movement and circulation of a sea star is accomplished by canals within the animal that fill with water, a system called the water vascular system"