File:Patten031.jpg

Fig. 31. Schematic longitudinal-section diagrams of the chick showing four stages in the formation of the gut tract

The embryos are represented as unaffected by torsion.

A chick toward the end of the first day of incubation; no regional differentiation of primitive gut is as yet apparent.

B toward the end of the second day; fore-gut established.

C chick of about three days; fore-gut, mid-gut and hindgut established.

D chick of about four days; fore-gut and hind-gut increased in length at expense of mid-gut; yolk-stalk formed.

Links: Introduction | Gametes and Fertilization | Segmentation | Entoderm | Primitive Streak and Mesoderm | Primitive Streak to Somites | 24 Hours | 24 to 33 Hours | 33 to 39 Hours | 40 to 50 Hours | Extra-embryonic Membranes | 50 to 55 Hours | Day 3 to 4 | References | All Figures

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Pages where the terms "Historic" (textbooks, papers, people, recommendations) 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, interpretations and recommendations may not reflect our current scientific understanding.     (More? Embryology History | Historic Embryology Papers)

Reference

Patten BM. The Early Embryology of the Chick. (1920) Philadelphia: P. Blakiston's Son and Co.

Cite this page: Hill, M.A. (2024, April 26) Embryology Patten031.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Patten031.jpg

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