Enterocoelia

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The enterocoely is a characteristic feature of the Deuterostomia and refers to the formation of the mesoderm from a cleavage of the primitive gut, said a trimeric coelom forms (Protocoel, Mesocoel, Metacoel). The formation of the mesoderm and the coelom occurs simultaneously.

In enterocoal development, gastrulation begins with one side of the blastula invaginating to the archenteron (primeval intestine). In the course of the further invagination of the primitive intestine with lengthening of the intestinal tube that forms, the sides of the archenteron slide outwards and expand to form a pocket-like coelom compartment. The Coelom compartment constricts to form a space enclosed by mesoderm that surrounds the intestine. In the resulting cavity, the coelom, liquid collects.

In contrast, the mesoderm and coelom of the protostomia arise from schizocoelia . The mesoderm arises from independent cell lines (mesoderm precursor cells), which often arise from a single cell, the so-called 4d cell.

Individual evidence

  1. ^ Archicoelomata. (PDF; 217 kB) University of Mainz, accessed on January 1, 2012
  2. Biology at a Glance. (PDF; 216 kB) p. 11. Accessed January 1, 2012
  3. Cleveland P. Hickman, Larry S. Roberts, Allan Larson, David J. Eisenhour: Zoologie. 13th edition, Pearson Deutschland GmbH, 2008, ISBN 3-827-37265-8 , pp. 245-248. limited preview in Google Book search