Text book of the Embryology of Invertebrates volume 2
Text book of the Embryology of Invertebrates volume 2
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In our eReader you can find the full English version of the book. Read Text book of the Embryology of Invertebrates volume 2 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Text book of the Embryology of Invertebrates volume 2
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Fig. 50 B and C), the egg dividing up first into two, then into four, eight, and sixteen cleavage-spheres of equal size, which are similarly filled with spherules of yolk. Within each of these cleavage-spheres lies a nucleus surrounded by a star-like mass of protoplasm which sends out numerous processes. The further cleavage proceeds, the more do these separate nuclei approach the surface of the egg. As a consequence of this they lose control of those portions of the now prismatic cleavage-cell...s which stretch inwards. The result is a stage in which cell-regions can be dis- tinguished at the surface divided by furrows, while in the interior of the egg the originally distinct cells have become secondarily fused together (Fig. 50 D). The cleavage has become superficial. At the same time an even sharper distinction between formative and nutritive yolk takes place. The superficial cells finally contain only formative yolk, and become separated from the nutritive yolk by a distinct line. A blastula-stage (Fig.
What to read after Text book of the Embryology of Invertebrates volume 2?
You can find similar books in the "Read Also" column, or choose other free books by E Eugen Korschelt to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Fig. 50 B and C), the egg dividing up first into two, then into four, eight, and sixteen cleavage-spheres of equal size, which are similarly filled with spherules of yolk. Within each of these cleavage-spheres lies a nucleus surrounded by a star-like mass of protoplasm which sends out numerous processes. The further cleavage proceeds, the more do these separate nuclei approach the surface of the egg. As a consequence of this they lose control of those portions of the now prismatic cleavage-cell...s which stretch inwards. The result is a stage in which cell-regions can be dis- tinguished at the surface divided by furrows, while in the interior of the egg the originally distinct cells have become secondarily fused together (Fig. 50 D). The cleavage has become superficial. At the same time an even sharper distinction between formative and nutritive yolk takes place. The superficial cells finally contain only formative yolk, and become separated from the nutritive yolk by a distinct line. A blastula-stage (Fig.
What to read after Text book of the Embryology of Invertebrates volume 2?
You can find similar books in the "Read Also" column, or choose other free books by E Eugen Korschelt to read onlineMoreLess
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