Development of the Primary Optic Vesicle in a Chick

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Longitudinal section of the primary optic vesicle in the chick. Labels: A, from an embryo of 65 hours; B, a few hours later; C, of the fourth day; c, the corneous layer or epidermis, presenting in A the open depression from the lends , which is closed in B and C; l, the lens follicle and lens; pr, the primary optic vesicle; in A and B, the pedicle is shown; in C, the section being to the side of the pedicle, the latter is not shown; v, the secondary ocular vesicle and vitreous humour.


Bird Anatomy


Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 836


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