AskDefine | Define organogenesis

User Contributed Dictionary



  1. the formation and development of the organs of an organism from embryonic cells


Extensive Definition

In animal development, organogenesis is the process by which the ectoderm, endoderm, and mesoderm develop into the internal organs of the organism. Internal organs initiate development in humans within the 3rd to 8th weeks in utero.The germ layers in organogenesis differ by three processes: folds, splits, and condensation. Developing early during this stage in chordate animals are the neural tube and notochord. Vertebrate animals all differentiate from the gastrula the same way. Vertebrates develop a neural crest that differentiates into many structures, including some bones, muscles, and components of the peripheral nervous system. The coelom of the body forms from a split of the mesoderm along the somite axis.


The proceeding graph represents the products produced by the three germ layers.



  • Evers, Christine A., Lisa Starr. Biology:Concepts and Applications. 6th ed. United States:Thomson, 2006. ISBN 0-534-46224-3.
organogenesis in German: Organogenese
organogenesis in Spanish: Organogénesis
organogenesis in Dutch: Organogenese
organogenesis in Polish: Organogeneza
organogenesis in Slovak: Organogenéza (embryogenéza)
organogenesis in Serbian: Органогенеза
organogenesis in Finnish: Organogeneesi
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