Morphology of the distal tip of the upper mandible of the ostrich ( Struthio camelus ) embryo during hatching
| Autor: | M. K. Richardson, C. Cope, D. C. Deeming |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Struthioniformes
animal structures Morphology (linguistics) Hatching Mandible Egg tooth Embryo General Medicine Anatomy Biology biology.organism_classification Egg Shell embryonic structures Microscopy Electron Scanning Animals Animal Science and Zoology Inner shell Process (anatomy) Food Science Struthio |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1466-1799 0007-1668 |
| DOI: | 10.1080/00071669888809 |
| Popis: | 1. The morphology of the distal part of the upper mandible in ostrich embryos was investigated using scanning electron microscopy just prior to and during hatching. 2. Although a keel-like structure on the tip of the upper mandible superficially resembles an egg tooth it appears to play no role during hatching. 3. The distal tip of the upper mandible is covered by an amorphous layer, the right side of which disappears during the hatching process. This layer acts to protect the beak during the rubbing process which creates a hole in the inner shell membrane during hatching. |
| Databáze: | OpenAIRE |
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