Image:Gray15.png

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Description

This faithful reproduction of a lithograph plate from Gray's Anatomy, a two-dimensional work of art, is not copyrightable in the U.S. as per Bridgeman Art Library v. Corel Corp.; the same is also true in many other countries, including Germany. Unless stated otherwise, it is from the 20th U.S. edition of Gray's Anatomy of the Human Body, originally published in 1918 and therefore lapsed into the public domain. Other copies of Gray's Anatomy can be found on Bartleby and also on Yahoo!.

Caption: Series of transverse sections through the embryonic disk of Tarsius. (After Hubrecht.) Section I passes through the disk, in front of Hensenâs knot and shows only the ectoderm and entoderm. Sections II, III, and IV pass through Hensenâs knot, which is seen in V tapering away into the primitive streak. In III, IV, and V the mesoderm is seen springing from the keel-like thickening of the ectoderm, which in III and IV is observed to be continuous into the entoderm.

This image is in the public domain because its copyright has expired. This applies worldwide.