File:Echidna early cleavage.jpg
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Summary
[edit]DescriptionEchidna early cleavage.jpg | Fig. 161. Early cleavage in Echidna. (Courtesy, Flynn and Hill, '39.) (A) Four-cell stage. (B) Eight-cell stage. (C) About 16-cell stage. Two meridional and four vertical cleavages have occurred. (D) About 32-cell stage. Observe marginal and central cells. (E) Section through blastodisc of 4 to 8-cell stage. (F) Section through blastoderm of 16-cell stage. See (C). (G) Section through blastoderm of 32-cell stage, showing central and marginal cells. |
Date | |
Source | https://archive.org/details/comparativeembry00nels/page/325/mode/1up?view=theater&q=BLASTULATION+ Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illustrations. |
Author | Nelsen, Olin E. |
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current | 15:34, 11 March 2024 | ![]() | 1,023 × 1,565 (1.41 MB) | Rasbak (talk | contribs) | {{Information |description=Fig. 161. Early cleavage in Echidna. (Courtesy, Flynn and Hill, '39.) (A) Four-cell stage. (B) Eight-cell stage. (C) About 16-cell stage. Two meridional and four vertical cleavages have occurred. (D) About 32-cell stage. Observe marginal and central cells. (E) Section through blastodisc of 4 to 8-cell stage. (F) Section through blastoderm of 16-cell stage. See (C). (G) Section through blastoderm of 32-cell stage, showing central and marginal cells. |date=1953 |sourc... |
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