Deuterostome
Deuterostome
Deuterostome (pronounced: /ˈdjuːtərəˌstoʊm/) is a term used in the field of Biology to classify a major group of animals. The term is derived from the Greek words "deuteros" meaning second and "stoma" meaning mouth.
Etymology
The term "Deuterostome" is derived from the Greek words "deuteros" meaning second and "stoma" meaning mouth. This is in reference to the developmental process of these animals, where the second opening in the embryo becomes the mouth.
Definition
Deuterostomes are a group of animals that include Vertebrates, Echinoderms, and Hemichordates. They are characterized by their embryonic development; in deuterostomes, the first opening (the blastopore) becomes the anus, while in protostomes, it becomes the mouth.
Related Terms
- Protostome: The other major group of animals in the field of biology, where the first opening in the embryo becomes the mouth.
- Blastopore: The first opening that forms in the embryo of an animal during early development.
- Echinoderm: A group of marine animals that are part of the deuterostome group.
- Vertebrate: An animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
- Hemichordate: A phylum of marine deuterostome animals, generally considered the sister group of the echinoderms.
External links
- Medical encyclopedia article on Deuterostome
- Wikipedia's article - Deuterostome
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