File:Cat Yolk segmentation.jpg
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editDescriptionCat Yolk segmentation.jpg |
Fig. 141.—YELK SEGMENTATION. |
Date | |
Source | https://archive.org/details/catintroduction00miva/page/319/mode/1up?view=theater The cat : an introduction to the study of backboned animals, especially mammals |
Author | Mivart, St. George Jackson, 1827-1900 |
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current | 01:02, 18 March 2024 | ![]() | 1,202 × 470 (563 KB) | Rasbak (talk | contribs) | {{information |description=Fig. 141.—YELK SEGMENTATION.<br> A. Impregnated ovum, with a single segmentation nucleus. h. External envelope. z. Zona pellucida, with spermatozoa. n. Segmentation nucleus. y. Protoplasm or yelk of the ovum.<br> B. Ovum, with the yelk divided into two cleavage cells, each with its nucleus. é. Epiblastic cleavage cell. t. Hypoblastic cleavage cell.<br> C. Fourth segmention into eight cells—four epiblastic and four hypoblastic. |date=1881 |source=https://archive.org... |
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