File:The American journal of anatomy (1901) (14780865891).jpg

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Identifier: americanjournalo06wist (find matches)
Title: The American journal of anatomy
Year: 1901 (1900s)
Authors: Wistar Institute of Anatomy and Biology Association of American Anatomists
Subjects: Anatomy Anatomy
Publisher: Baltimore, MD : (s.n.)
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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14 days after the removal of the optic vesicle. X 180diameters. Fig. 15. Outline drawing of fourth operative stage (X), showing nodivision of the gill mass. X 6% diameters. Fig. 16. Section through eye region of an embryo of the above stage (X),showing a well-defined lens-bud. X 45 diameters. Fig. 17. Experiment Xo^. Section through right lens 14 days after thecomplete extirpation of the optic cup. The medial pole has disappeared, andonly a few lens-fibers indicate its former position. The lens is small, meas-uring only about 100 //, while the normal one is about 160 // in diameter.X 180 diameters. Fig. 18. Experiment X23. Section through right lens of an embryo killed7 days after the operation. The lack of influence of the optic cup has re-sulted in the retardation in growth and differentiation of the lens. X 180diameters. Fig. 19. Experiment X03. Section through the left normal lens of theabove embryo. X 180 diameters. ORIGIN AND DIFFERENTIATION OF THE LENS WILBUR L. LECRON PLATE II
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AMERICAN JOURNAL OF ANATOMY—VOL. VI PLATE III. Fig. 20. Outline drawing of the fifth operative stage (XII). The gill massshows three divisions, and the tentacles are beginning to develop. X 6^^diameters. Fig. 21. Section through eye region of an embryo of above stage (XII).The lens-vesicle Is divided off from the ectoderm, but still in close contactwith same. X 45 diameters. Fig. 22. Experiment XII51. Section through right lens-vesicle of an em-bryo killed 2 hours after the complete extirpation of the optic cup, showingno special changes within this time. X 180 diameters. Fig. 23. Experiment XII51. Section through left normal lens of aboveembryo, killed 2 hours after the operation. X 180 diameters. Fig. 24. Experiment XII^. Section through the right lens-vesicle of anembryo killed 2 days after removal of the optic cup. The lens is similar tothe normal one in size, 150 ji in diameter, and in differentiation. X 180diameters. Fig. 25. Experiment XIIjo. Section through left normal lens

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v. 6
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30 July 2014

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