Deuterostome

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). Full article ...

Deuterostomes differ from the other Bilateria, called protostomes, in several ways. In both cases there is a complete digestive tract. However, in protostomes the initial opening (the archenteron) develops into the mouth, and an anus forms separately.

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 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.

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.

The Deuterostomes Echinoderms (Phylum Echinodermata) Chordates (Phylum Chordata) Tunicata Cephalochordata ...

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.

[Gr. koilomatos - a hollow]. A body cavity lined by mesoderm. It is usually formed through either enterocoelic pouching (in Deuterostomes) or by schizocoely (in Protostomes).

See also: Embryo, Organ, Segment, Cells, Animal