File:Branchiostoma formation of the neural tube, notochord, mesoderm, and coelom.jpg

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Description Fic. 6.—Formation of the neural tube, notochord, mesoderm, and coelom in Amphioxus. A-D, cross-sections; E, frontal section. A, differentiation of the medullary plate a, the notochordal plate d, the neural folds b, and the mesodermal pouches e. B, the neural folds have closed across above the medullary plate; the mesodermal pouches are farther evaginated. C, the medullary and notochordal plates are beginning to close; the mesodermal pouches f are completely separated from the entoderm. D, the neural tube j and the notochord c are completed; the mesodermal pouches are increasing in size. E, frontal section to show the mesodermal pouches f originating from the entoderm segmentally. a, medullary plate; b, neural fold; c, notochord; d, notochordal plate; e, mesoderm; f, mesodermal pouches; g, ectoderm; h, entoderm or archenteron; i, coelom. In all figures the mesoderm is stippled. (From Parker and Haswell’s Textbook of Zodlogy, after Hatschek, courtesy of the Macmillan Company.)
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Source https://archive.org/details/cu31924021952902/page/37/mode/1up?view=theater A laboratory manual for comparative vertebrate anatomy
Author Hyman, Libbie Henrietta, 1888-1969

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current11:32, 13 March 2024Thumbnail for version as of 11:32, 13 March 20241,172 × 857 (562 KB)Rasbak (talk | contribs){{Information |description=Fic. 6.—Formation of the neural tube, notochord, mesoderm, and coelom in Amphioxus. A-D, cross-sections; E, frontal section. A, differentiation of the medullary plate a, the notochordal plate d, the neural folds 6, and the mesodermal pouches e. B, the neural folds have closed across above the medullary plate; the mesodermal pouches are farther evaginated. C, the medullary and notochordal plates are beginning to close; the mesodermal pouches f are completely separate...

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