Archenteron

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The archenteron ( Greek ἀρχή, arché = 'beginning' and ἔντερον, enteron = 'intestine') or primitive bowel is a cavity that is created during gastrulation and opens outwards through the primordial mouth (blastopore) in embryogenesis . The digestive tract of the relevant organism is ultimately formed from the archenteron .

description

1 = blastula, 2 = gastrula
orange = ectoderm, red = endoderm

Gastrulation is a stage in multicellular embryogenesis . At this stage of development, invagination of the blastula wall forms the gastrula. This creates a double-walled structure with the two cotyledons ectoderm (outside) and endoderm (inside). While the ectoderm forms the outer surface of the embryo and later forms the outer body covering, the endoderm forms the embryonic primeval intestine, the archenteron. In the further course of embryogenesis, the digestive tract and internal organs develop from the primitive intestine.

See also

literature

  • WA Müller, M. Hassel: Developmental and reproductive biology of humans and animals. 4th edition, Springer, 2005, ISBN 3-540-24057-8 , p. 43. Restricted preview in the Google book search

Individual evidence

  1. ^ Wissenschaft-online.de: Archenteron. Retrieved December 31, 2011
  2. ^ Wolfgang Clauss, Cornelia Clauss: Zoology for veterinarians. Georg Thieme Verlag, 2005, ISBN 3-830-41037-9 , p. 87. Restricted preview in the Google book search