Definition, Characteristics, Species, Facts - Britannica Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin Living species include sea lilies, sea urchins, sea cucumbers, starfishes, basket stars, and sea daisies Learn more about echinoderms
Echinoderm - Wikipedia An echinoderm ( ɪˈkaɪnəˌdɜːrm, ˈɛkə - ) [2] is any animal of the phylum Echinodermata ( ɪˌkaɪnoʊˈdɜːrmətə ), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies" [3]
Phylum Echinodermata- Characteristics, classification, examples Echinoderms are enterocoelous coelomates with pentamerous radial symmetry, without distinct head or brain having a calcareous endoskeleton of separate plates or pieces and a peculiar water vascular system of coelomic origin with podia or tube-feet projecting out of the body
Phylum Echinodermata | manoa. hawaii. edu ExploringOurFluidEarth Echinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino - meaning spiny; Latin root word - derm meaning skin) Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig 3 83)
5. 6: Phylum Echinodermata - Biology LibreTexts The Phylum Echinodermata is distinguished by characteristics such as spiny-skin, pentaradial symmetry, and an endoskeleton composed of calcareous ossicles Given that all species in this phylum are exclusively marine dwellers, they also evolved a specialized water-vascular system
Phylum Echinodermata – Definition, Classification, Characteristics . . . Phylum Echinodermata encompasses marine organisms characterized by a calcareous endoskeleton, pentamerous radial symmetry in adulthood, and a specialized water vascular system, with notable members including starfish, sea urchins, and sea cucumbers
Phylum Echinodermata | Biology for Majors II - Lumen Learning Echinodermata are so named owing to their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”), and this phylum is a collection of about 7,000 described living species Echinodermata are exclusively marine organisms
Echinoderms - Definition, Characteristics, Types and Examples Echinoderms are a diverse group of marine animals belonging to the phylum Echinodermata They are characterized by their radial symmetry, that is, their bodies are arranged in a symmetrical pattern about a central axis
Echinodermata - Encyclopedia. com Echinodermata A phylum of marine invertebrates that includes the sea urchins, starfish, brittlestars, and sea cucumbers Echinoderms have an exoskeleton (test) of calcareous plates embedded in the skin In many species (e g sea urchins) spines protrude from the test
Definition, Characteristics Examples - Biology Dictionary An echinoderm is a member of the phylum Echinodermata which contains a number of marine organisms recognized by their pentamerous radial symmetry, calcareous endoskeleton, and a water vascular system which helps operate their small podia