From Embryology
Revision as of 07:08, 31 August 2011 by S8600021 (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Original file(800 × 630 pixels, file size: 85 KB, MIME type: image/jpeg)

Fig. 3. Vertical Section through Head of Foetal Pig, 2 mm long

Magnified 2,500 times.

As this stalk grows outward, the anterior portion rises upward, as shown in vertical section at A, Fig. 3. When the optic stalk comes near to the surface, the anterior portion enlarges, as shown at C, Fig. i. Also when the optic stalk encroaches on the surface, it stimulates the epithelial cells forming- the skin and they multiply rapidly (see B, Figs. I and 3), and the anterior wall of the primary optic vesicle invaginates and passes inside of the vesicle. (See A, Fig. 2, and C, Fig. 3.) This invagination might be likened to the denting of a hollow rubber ball. This invaginated portion forms the secondary optic vesicle and it is from this that the nine innermost layers of the retina are eventually formed, while the primary optic vesicle only forms the outer or pigment layer.

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)
The Embryology Anatomy and Histology of the Eye: Embryology | Anatomy | Histology | Figures


Brown EJ. The embryology anatomy and histology of the eye. (1906) Chicago: Hazlitt & Walker.

Cite this page: Hill, M.A. (2024, May 24) Embryology Brown003.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

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

current13:12, 14 February 2011Thumbnail for version as of 13:12, 14 February 2011800 × 630 (85 KB)MarkHill (talk | contribs){{Template:Brown 1906 Figures}}