From Embryology

Bailey461.jpg(751 × 394 pixels, file size: 54 KB, MIME type: image/jpeg)

Fig. 461. Section through head of chick of three days' incubation


The thickened portion of ectoderm is known as the lens area (Fig. 460). The latter next becomes depressed against the outet surface of the optic vesicle forming a distinct lens invagination (Fig. 461).

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" (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)


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

Cite this page: Hill, M.A. (2024, June 19) Embryology Bailey461.jpg. Retrieved from

What Links Here?
© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

File history

Yi efo/eka'e gwa ebo wo le nyangagi wuncin ye kamina wunga tinya nan

current13:46, 1 February 2011Thumbnail for version as of 13:46, 1 February 2011751 × 394 (54 KB)S8600021 (talk | contribs)
13:41, 1 February 2011Thumbnail for version as of 13:41, 1 February 2011679 × 345 (52 KB)S8600021 (talk | contribs)