Definition, Characteristics, Species, & Facts - Britannica
4 天之前 · 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.
Phylum Echinodermata- Characteristics And Classifications
Members of Phylum Echinodermata are multicellular organisms found exclusively in marine water. The term Echinodermata indicates that these are spinny-skinned organisms.
Phylum Echinodermata- Characteristics, classification, examples
2023年8月3日 · Phylum Echinodermata Characteristics. They are exclusively marine and are among the most common and widely distributed marine animals. They occur in all seas from the intertidal zones to great depths. They have an organ grade system of body organization. Symmetry usually radial, nearly always pentamerous.
Definition, Characteristics & Examples - Biology Dictionary
2019年10月4日 · 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.
Echinoderm - Wikipedia
The characteristics of adult echinoderms are the possession of a water vascular system with external tube feet and a stereom endoskeleton. Stereom is a calcareous material consisting of ossicles connected by a mesh of collagen fibres, which is unique to this phylum.
28.5A: Phylum Echinodermata - Biology LibreTexts
2023年10月31日 · Phylum Echinodermata. Echinodermata are so named owing to their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”). This phylum is a collection of about 7,000 described living species. Echinodermata are …
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.
Phylum Echinodermata - Definition, Classification, Characteristics ...
2024年10月2日 · In essence, Phylum Echinodermata represents a diverse group of marine organisms, distinguished by their unique water vascular system, radial symmetry, and regenerative capabilities, among other characteristics.
Echinoderms - Definition, Examples, Characteristics, and Habitat
2024年5月6日 · Phylum Echinodermata Found on the ocean bed, they reproduce asexually and are capable of completely regenerating their body parts. They are well-recognized for their unique water vascular system, a fluid-filled canal network that functions in gas exchange.
5.6: Phylum Echinodermata - Biology LibreTexts
2022年8月24日 · Echinodermata. 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.