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This is a plate from Gray's Anatomy. Unless stated otherwise, it is from the online edition of the 20th U.S. edition of Gray's Anatomy of the Human Body, originally published in 1918.
Caption: A series of transverse sections through an embryo of the dog. (After Bonnet.) Section I is the most anterior. In V the neural plate is spread out nearly flat. The series shows the uprising of the neural folds to form the neural canal. a. Aortæ. c. Intermediate cell mass. ect. Ectoderm. ent. Entoderm. h, h. Rudiments of endothelial heart tubes. In III, IV, and V the scattered cells represented between the entoderm and splanchnic layer of mesoderm are the vasoformative cells which give origin in front, according to Bonnet, to the heart tubes, h; l.p. Lateral plate still undivided in I, II, and III; in IV and V split into somatic (sm) and splanchnic (sp) layers of mesoderm. mes. Mesoderm. p. Pericardium. so. Primitive segment.
This image in the public domain because its copyright has expired. This applies worldwide.
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Originally from en.wikipedia; description page is (was) here
- 19:08, 27 March 2004 Magnus Manske 500x426 (93,510 bytes) (From [[:en:Gray's Anatomy]], in the [[:en:public domain]])
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Commons upload by File Upload Bot (Magnus Manske) 11:44, 18 May 2006 (UTC)
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User Magnus Manske on en.wikipedia
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