Deuterostomes
A group of Metazoans that exhibit indeterminate, radial cleavage and that develop a mouth independent of, and at some distance from, the blastopore. (Echinoderms and Chordates and related minor phyla).
deuterostomes Animals in which the first opening that appears in the embryo becomes the anus while the mouth appears at the other end of the digestive system. Main groups include chordates and echinoderms.
Deuterostomes
Superb Fairy-wren, Malurus cyaneus
Deuterostomes differ from the other Bilateria, called protostomes, in several ways. In both cases there is a complete digestive tract.
deuterostomes - broad classification of triploblastic animals including echinoderms and chordates that tend to share certain embryological traits; among these the formation of the "mouth second" (hence the name) during gastrulation, ...
deuterostome
An evolutionary line of coelomates (ex. echinoderms and chordates) that are characterized by radial, indeterminate cleavage and development of the anus from the blastopore.
Deuterostomes
Deuterostomes differ from the other Bilateria, called protostomes, in several ways. In both cases there is a complete digestive tract.
The Deuterostomes
The features of these animals are listed above. The most prominent members of this group belong to the echinoderms and the chordates.
Echinoderms (Phylum Echinodermata)
Characteristics: ...
Deuterostomes (as exemplified by the echinoderms and chordates) develop the anus first, then the mouth at the other end of the embryo. Deuterostomes are coelomate animals these embryological characteristics: ...
deuterostomes Animals in which the anus forms from, or in the region of, the blastopore; often characterized by enterocoelous coelom formation, radial cleavage, and the presence of a dipleurulalike larval stage.
A type of embryonic development in deuterostomes in which the planes of cell division that transform the zygote into a ball of cells are either parallel or perpendicular to the polar axis, thereby aligning tiers of cells one above the other.
 See also: Organ, Embryo, Animal, Segment, Plant
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