| Anatomy of the Human Body > Illustrations > Fig. 9 | CONTENTS · ILLUSTRATIONS · SUBJECT INDEX |
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| First stages of segmentation of a mammalian ovum. Semidiagrammatic. (From a drawing by Allen Thomson.) z.p. Zona striata. p.gl. Polar bodies. a. Two-cell stage. b. Four-cell stage. c. Eight-cell stage. d, e. Morula stage. |
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