| Anatomy of the Human Body > Illustrations > Fig. 64 | CONTENTS · ILLUSTRATIONS · SUBJECT INDEX |
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| Transverse section of a human embryo of the third week to show the differentiation of the primitive segment. (Kollmann.) ao. Aorta. m.p. Muscle-plate. n.c. Neural canal. sc. Sclerotome. s.p. cutis-plate. |
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