File:Bailey087.jpg

From Embryology
Original file(928 × 803 pixels, file size: 132 KB, MIME type: image/jpeg)

Fig. 87. Human embryo with twenty-seven primitive segments (7 mm, 26 days)

Mall.

In a 7 mm embryo described by Mall (Fig. 87), the flexures are slightly more accentuated than in the 4-mm stage. The branchial arches and grooves are still prominent. The first groove, of which the dorsal part marks the site of the external auditory meatus, is at this time particularly well developed. The eye is a stronger feature than in the preceding stage. The distinct depression in front of the first arch is the nasal fossa. The limb buds are larger than in the 4 mm embryo. The general curvature of the embryo is so sharp at this stage that the rudimentary tail is almost in contact with the head.


Online editor - The term "branchial arch" in human embryos is now more commonly called a "pharyngeal arch".


Links: Fig. 87 in text | Carnegie stage 14 | Week 5



Text-Book of Embryology: Germ cells | Maturation | Fertilization | Amphioxus | Frog | Chick | Mammalian | External body form | Connective tissues and skeletal | Vascular | Muscular | Alimentary tube and organs | Respiratory | Coelom, Diaphragm and Mesenteries | Urogenital | Integumentary | Nervous System | Special Sense | Foetal Membranes | Teratogenesis | Gallery of All Figures
Historic Disclaimer - information about historic embryology pages 
Mark Hill.jpg
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? 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. (2018, August 20) Embryology Bailey087.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Bailey087.jpg

What Links Here?
© Dr Mark Hill 2018, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current15:45, 18 January 2011Thumbnail for version as of 15:45, 18 January 2011928 × 803 (132 KB)S8600021 (talk | contribs)
  • You cannot overwrite this file.