...Cleavage: see segmentation of egg... 
John. B. Smith 「Explanation of Terms Used in Entomology」
...These are the first signs of segmentation...
J. Henri Fabre 「Bramble-bees and Others」
...We have, up to the present, only considered that form of segmentation andgastrulation which, for many and weighty reasons, we may regard as theoriginal, primordial, or palingenetic form...
Ernst Haeckel 「The Evolution of Man」
...Although this unequal segmentation of the cyclostoma, ganoids, and amphibiaseems at first sight to differ from the original equal segmentation (forinstance, in the monoxenia, Fig...
Ernst Haeckel 「The Evolution of Man」
...The larger the accumulation of food, the more restricted is theprocess of segmentation...
Ernst Haeckel 「The Evolution of Man」
...In spring they are to be found in clusters in every pond, andcareful examination of the ova with a lens is sufficient to show at least theexternal features of the segmentation...
Ernst Haeckel 「The Evolution of Man」
...Also the upper and darker hemisphereremains in this position throughout the course of the segmentation, and itscells multiply much more briskly...
Ernst Haeckel 「The Evolution of Man」
...Their segmentation isincomplete or partial...
Ernst Haeckel 「The Evolution of Man」
...When the fertilisation of the bird’s ovum has taken place within themother’s body, we find in the lens-shaped stem-cell the progress of flat,discoid segmentation (Fig...
Ernst Haeckel 「The Evolution of Man」
...57—Diagram of discoid segmentation in the bird’sovum (magnified)...
Ernst Haeckel 「The Evolution of Man」
...In order to complete our consideration of the important processes ofsegmentation and gastrulation, we will, in conclusion, cast a brief glance atthe fourth chief type—superficial segmentation...
Ernst Haeckel 「The Evolution of Man」
...Onlythe latter exhibit the important processes of segmentation and gastrulation;and they alone have a primitive gut, and form germinal layers and tissues...
Ernst Haeckel 「The Evolution of Man」
...In the genealogical treeof the Vertebrates this palingenetic form of segmentation has been preserved inthe Amphioxus alone, all the other Vertebrates having cenogenetically modifiedforms of cleavage...
Ernst Haeckel 「The Evolution of Man」
...In any case, the latter were developed from the former, andso the segmentation of the ovum in the Amphioxus has a great interest for us(cf...
Ernst Haeckel 「The Evolution of Man」
...Thus the chief advantage in organisation by whichthe earliest Vertebrates took precedence of the unsegmented Chordonia consistedin the development of internal segmentation...
Ernst Haeckel 「The Evolution of Man」
...From these segmentalmuscle-plates, which are chiefly concerned in the segmentation of theVertebrates, proceed the lateral muscles of the stem, as we find in thesimplest form in the Amphioxus (Fig...
Ernst Haeckel 「The Evolution of Man」
ランダム例文：
便利！手書き漢字入力検索
時事ニュース漢字 📺