Difference between revisions of "File:Bailey086.jpg"

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[[Category:Human]] [[Category:Kollmann]] [[Category:Carnegie stage 13]]
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[[Category:Human]] [[Category:Kollmann]] [[Category:Carnegie Stage 13]]

Latest revision as of 09:30, 13 April 2011

Fig. 86. Human embryo of 4 mm

Rabl, from Kollmann's Atlas.

An embryo of 4 mm. is shown in Fig. 86. All the flexures are accentuated, so that the head and tail are close together. The fourth branchial arch has appeared behind the third groove and a fourth groove behind the fourth arch. The small structure behind the fourth groove may be the rudimentary fifth arch. The arches diminish rather uniformly from the first to the last. The rudiment of the eye is visible on the side of the forebrain region as a circular eminence surrounded by a slight groove. The heart protuberance is strikingly prominent. Certain new features have appeared at 'this stage, the limb buds. The fore-limb bud is a rounded eminence opposite the anterior part of the dorsal flexure; the hind-limb a similar structure opposite the sacral flexure. The limb buds, as tar as surface appearance goes, are Simply outgrowths from the body wall starting as small rounded eminences which, as development proceeds, become larger and finally differentiated into the various parts of the extremities.


Links: Fig. 86 in text



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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

Bailey FR. and Miller AM. Text-Book of Embryology (1921) New York: William Wood and Co.



Cite this page: Hill, M.A. (2020, November 26) Embryology Bailey086.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey086.jpg

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