what echinoderm means
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ECHINODERMATA Noun. 1. Echinodermata-radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers. phylum Echinodermata. animal kingdom, Animalia, kingdom Animalia-taxonomic kingdom comprising all living or extinct animals.
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What is an echinoderm? There are five kind of Echinoderms, sea stars, brittle stars, sea cucumbers, sea urchins, and sand dollars.
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Echinodermata sea stars, sea urchins, sea cucumbers, and relatives (Also: echinoderms) Reproduction. Mating System; polygynandrous (promiscuous) Echinoderms are mainly gonochoristic (having separate sexes), with exceptions among the asteroids, holothurians and ophuroids. Holothurians possess a single gonad, crinoids lack distinct gonads, while asteroids and echinoids have multiple gonads.
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ectoderm Medical Definition of ectoderm. 1  1: the outermost of the three primary germ layers of an embryo. 2  2: a tissue (as neural tissue) derived from ectoderm.
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Definitions &Translations Echinoderm. Echinoderms are a phylum of marine animals. The adults are recognizable by their radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers.Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone.chinoderms are a phylum of marine animals. The adults are recognizable by their radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers.
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- 7 Articles in: Echinoderms-Animals and Wildlife-About.com. Echinoderms are a group of marine invertebrates that includes star fish, sea lilies, feather stars, brittle stars, sea cucumbers and sea urchins. Articles in: Echinoderms-Animals and Wildlife-About.com. Echinoderms are a group of marine invertebrates that includes star fish, sea lilies, feather stars, brittle stars, sea cucumbers and sea urchins.
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Echinoderm Reproduction & Larvae After spawning, a few species of echinoderms will care for their fertilized eggs, most commonly the cold water starfishes. Asexual Reproduction The most common form of asexual reproduction in echinoderms is a process known as fragmentation. This is when an animal's body is divided into two or more parts, and both become individual animals. It's a lot like how a split earthworm can form two separate worms.
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Echinoderms There are several distinct groups of echinoderms related to sea stars (also known as starfish). Sea urchins and sand dollars are grouped together because they have large solid plates that form around their soft bodies.chinoderms 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.
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Echinoderm Echinodermata is the largest phylum that does not have any of its organisms living on land or in fresh water. The most common Echinoderms are starfish, sea cucumbers, sea urchins, and sand dollars. The name literally means, in Greek, spiny skinned, because that's what echinoderms look like.
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Echinodermata Echinoids— sea urchins sea urchin,spherical-shaped echinoderm with movable spines covering the body. The body wall is a firm, globose shell, or test, made of fused skeletal plates and marked by regularly arranged tubercles to which the movable spines are attached......
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Echinoderm  [show article only]hover over links in text for more info Echinoderms evolved from animals with bilateral symmetry. Although adult echinoderms possess pentaradial, or five-sided, symmetry, echinoderm larvae are ciliated, free-swimming organisms that organize in bilateral symmetry which makes them look like embryonic chordates.ll echinoderms are marine and nearly all are benthic. The oldest known echinoderm fossil may be Arkarua from the Precambrian of Australia. It is a disc-like fossil with radial ridges on the rim and a five-pointed central depression marked with radial lines.
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Mollusks August 4, 2010 by bknysh 2 Comments. Echinoderms are a type of invertebrate found in marine or ocean environments. Common echinoderms include the sea star, sea urchin, sand dollar and sea cucumber. Most echinoderms have arms or spines that radiate from the center of their body.nidaria are a class of invertebrates found in aquatic or marine environments. The name Cnidaria comes from the Greek word cnidos, meaning stinging nettle. There are about 9,000 species of cnidaria, the most common being the jellyfish, sea anemone, and coral.
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Echinoderm Anatomy. An Echinoderm has five-fold radial symmetry when it's an adult with five arms and spines or bumps all over its body. They have a calcite endoskeleton composed of many tiny plates and spines. This forms, within the tissues, a kind of firm support for the organism.These are microscopic in sea cucumbers.natomy. An Echinoderm has five-fold radial symmetry when it's an adult with five arms and spines or bumps all over its body. They have a calcite endoskeleton composed of many tiny plates and spines. This forms, within the tissues, a kind of firm support for the organism.
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echinoderm 1. (Animals) any of the marine invertebrate animals constituting the phylum Echinodermata, characterized by tube feet, a calcite body-covering (test), and a five-part symmetrical body.ny of various invertebrate sea animals having a hard spiny outer covering, an internal skeleton, and a radially symmetrical body. Starfish, sea urchins, and sea cucumbers are echinoderms.
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Echinoderm  [show article only]hover over links in text for more info The adults are recognizable by their (usually five-point) radial symmetry, and include such well-known animals as starfish, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or stone lilies. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7000 living species, making it the second-largest grouping of deuterostomes (a superphylum), after the chordates (which include the vertebrates, such as birds, fishes, mammals, and reptiles).
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- Echinoderm is the common name given to any member of the phylum Echinodermata (from Ancient Greek, ἐχῖνος, echinos – hedgehog and δέρμα, derma – skin)[2] of marine animals.
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starfish dissection E chinoderms are radially symmetrical animals that are only found in the sea (there are none on land or in fresh water). Echinoderms mean spiny skin in Greek.Many, but not all, echinoderms have spiny skin. There are over 6,000 species.Echinoderms usually have five appendages (arms or rays), but there are some exceptions. chinoderms are radially symmetrical animals that are only found in the sea (there are none on land or in fresh water). Echinoderms mean spiny skin in Greek.
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Crystal Meanings For educational use only. The phylum Echinodermata, which contains about 6000 species, gets its name from the Greek, literally meaning spiny skin.. Many echinoderms actually do have spiny skin, but others do not.
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- Define blastoderm: a blastodisc after completion of cleavage and formation of the blastocoel a blastodisc after completion of cleavage and formation of the blastocoel… See the full definition
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Echinoderm  [show article only]hover over links in text for more info Aside from the hard-to-classify Arkarua (a Precambrian animal with echinoderm-like pentamerous radial symmetry), the first definitive members of the phylum appeared near the start of the Cambrian. The echinoderms are important both biologically and geologically.chinoderms have a mesodermal skeleton composed of calcareous plates or ossicles. Each one of these, even the articulating spine of a sea urchin, is composed mineralogically of a crystal of calcite. If solid, these would form a heavy skeleton, so they have a sponge-like porous structure known as stereom.
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ECHINODERM Hyponyms (each of the following is a kind of echinoderm): sea star; starfish (echinoderms characterized by five arms extending from a central disk). brittle star; brittle-star; serpent star (an animal resembling a starfish with fragile whiplike arms radiating from a small central disc).
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Echinodermata - Echinoderms Echino - spiny, Derm - skin The group includes: 1  Class Asteroidea-Starfish / Sea Stars. 2  Free moving echinoderms where the body is comprised of rays or arms radiating from a central disc. usually 5 armed, but can be 7-14 in some species and up to 40 in others.3  Podia used for movement.he group includes: 1  Class Asteroidea-Starfish / Sea Stars. 2  Free moving echinoderms where the body is comprised of rays or arms radiating from a central disc. usually 5 armed, but can be 7-14 in some species and up to 40 in others.
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Ectoplasm (paranormal) Ectoplasm (paranormal) Ectoplasm (from the Greek ektos, meaning outside, and plasma, meaning something formed or molded) is a term coined by Charles Richet to denote a substance or spiritual energy exteriorized by physical mediums. Ectoplasm is said to be associated with the formation of spirits. Ectoplasm is considered by some to be a hoax, fashioned from cheesecloth, gauze or other natural substances.
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ectoderm Definition of ectoderm 1 a: the outermost of the three primary germ layers of an embryo that is the source of various tissues and structures (such as the epidermis, the nervous system, and the eyes and ears)
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Echinoderm The hard, spiny skin of an echinoderm is called an exoskeleton. 5. All echinoderms except the sand dollar display a five-part radial symmetry. 6. The adult form of all echinoderms exhibits radial symmetry. 7. Sea stars are carnivores and are among the most important predators in many marine ecosystems.
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Ectoderm Ectoderm is one of the three primary germ layers in the very early embryo. The other two layers are the mesoderm (middle layer) and endoderm (most proximal layer), with the ectoderm as the most exterior (or distal) layer.It emerges and originates from the outer layer of germ cells.he position of the ectoderm relative to the other germ layers of the embryo is governed by selective affinity, meaning that the inner surface of the ectoderm has a strong (positive) affinity for the mesoderm, and a weak (negative) affinity for the endoderm layer.