Many of the developmental changes in the chick embryo during its first 96 hours. Examine the 33-hour chick serial transverse section slide and compare the.
This membrane is made up of a bladderlike median ventral diverticulum of the hindgut endoderm, covered with splanchnic mesoderm. It connects with the hindgut, which will be found only in sections posterior to the posterior intestinal portal at this stage of development.
Ultimately, this double membrane will fill the exocoel, and its outer layer of mesoderm will fuse with mesoderm of the chorion and the aminion and finally with the splanchnic mesoderm of the yolk sac splanchnopleure. Its function in the chick is related to respiration and excretion. The entire outer covering of the chick embryo is of ectodermal origin and is made up largely of squamous epithelium but will later also include horny scales, feather germs, quills and barbs, claws, beak coverings, and a temporary eggtooth. By evaginations from the surface, the linings of the following structures are also derived from ectoderm: the mouth (stomodeal portion and stomodeal hypophysis); cloaca (proctodeal portion); visceral clefts (peripheral halves); nostrils; eye chamber and lens; otic vesicles; and external auditory meatus.
This historic 1920 paper by Bradley Patten described the understanding of chicken development. If like me you are interested in development, then these historic embryology textbooks are fascinating in the detail and interpretation of embryology at that given point in time.
As with all historic texts, terminology and developmental descriptions may differ from our current understanding. There may also be errors in transcription or interpretation from the original text. Currently only the text has been made available online, figures will be added at a later date.
My thanks to the Internet Archive for making the original scanned book available. By the same author:. (1938) Am J Pathol. PMID 19970381 Those interested in historic chicken development should also see the earlier text. London: Macmillan and Co. Modern Notes: Historic Disclaimer - information about historic embryology pages. Pages where the terms ' Historic Textbook' and ' Historic Embryology' appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication.
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This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms and interpretations may not reflect our current scientific understanding. Pages where the terms ' Historic Textbook' and ' Historic Embryology' appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication.
This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms and interpretations may not reflect our current scientific understanding. (More? ) Glossary Links: Cite this page: Hill, M.A. (2019, March 10) Embryology Book - The Early Embryology of the Chick - Figures.
Dragon ball z vs kai. Retrieved from © Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No.