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The coelom is the mesodermally lined cavity between the gut and the outer body wall. During the development of the embryo, coelom formation begins in the gastrulation stage. The developing digestive tube of an embryo forms as a blind pouch called the archenteron. In protostomes, the coelom forms by a process known as schizocoely. [6]
In the development of the human embryo, the intraembryonic coelom (or somatic coelom) is a portion of the conceptus forming in the mesoderm during the third week of development. [1] During the third week of development, the lateral plate mesoderm splits into a dorsal somatic mesoderm ( somatopleure ) and a ventral splanchnic mesoderm ...
The intraembryonic coelom is lined by somatic and splanchnic lateral plate mesoderm, while the extraembryonic coelom is lined by extraembryonic mesoderm. The intraembryonic coelom is the only cavity that persists in the mammal at term, which is why its name is often contracted to simply coelomic cavity.
Coeloma is an extinct genus of crabs belonging to the family Mathildellidae. The genus includes 19 species, [ 2 ] distributed among several subgenera, and is in need of revision. [ 1 ] The fossil record of the genus extends from the Eocene to the Miocene .
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Enterocoely is the stage of embryological development of deuterostomes in which the coelom forms. [4] This type of coelom formation occurs in deuterostome animals, which for this reason are also known as enterocoelomates. By contrast, in protostomes, the body cavity is often formed by schizocoely. [4]
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