Archive image from page 126 of The development of the chick. The development of the chick : an introduction to embryology . developmentofchi02lill Year: 1936 HEAD-FOLD TO TWELVE SOMITES 107 ceph. Mes £nd' Kifi. â B Fig. 62. â The head of the same embryo from beneath more highly magnified. In this drawing an attempt is made to show different levels of the embryo superposed: thus the heart is uppermost in the figure, beneath this the fore-gut (F. G.), beneath this the notbchord, and at the lowest level, the neural tube. a. c. s., Anterior cerebral suture. Inf., Infun
Archive image from page 126 of The development of the chick. The development of the chick : an introduction to embryology . developmentofchi02lill Year: 1936 HEAD-FOLD TO TWELVE SOMITES 107 ceph. Mes £nd' Kifi. â B Fig. 62. â The head of the same embryo from beneath more highly magnified. In this drawing an attempt is made to show different levels of the embryo superposed: thus the heart is uppermost in the figure, beneath this the fore-gut (F. G.), beneath this the notbchord, and at the lowest level, the neural tube. a. c. s., Anterior cerebral suture. Inf., Infundibulum. M. A., Mandibular arch. p. C, represents the anterior boundary of the parietal cavity, or. pi., Oral plate. Other abbreviations as before. is no clear distinction between brain and cord at first, the one passing without any anatomical landmark into the other. Now the brain is the central nervous system of the head, so it is not until one can determine the posterior boundary of the embryonic head that it becomes possible to determine the hind end of the
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