File:Bailey462.jpg

File
File history
File usage

No higher resolution available.

Bailey462.jpg ‎(463 × 411 pixels, file size: 45 KB, MIME type: image/jpeg)

Fig. 462. Showing somewhat later stage in development of optic cup and lens than is shown in Fig. 461

Duval.

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). This becomes cup-shaped and then its edges come together and fuse, thus forming the lens vesicle (Fig. 462). At first the lens vesicle is connected with the surface ectoderm, but about the eighth week a thin layer of mesoderm grows in between the lens vesicle and the surface ectoderm, completely separating them (Fig. 463).

Historic Disclaimer - information about historic embryology pages
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)