The Riddle of the Universe At the Close of the Nineteenth Century
The Riddle of the Universe At the Close of the Nineteenth Century
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In our eReader you can find the full English version of the book. Read The Riddle of the Universe At the Close of the Nineteenth Century 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 The Riddle of the Universe At the Close of the Nineteenth Century
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In every case a number of nerves branch off from this medulla in regular division, one pair to each segment or vertebra. In every case this medullary cord arises in the same way in the foetus ; a fine groove appears in the middle axis of the skin at the back ; then the par- allel borders of this medullary groove are lifted up a little, bend over towards each other, and form into a kind of tube.
The long dorsal cylindrical medullary tube which is thus formed is thoroughly characteristic of the v...er- tebrates ; it is always the same in the early embryonic sketch of the organism, and it is always the chief feat- ure of the different kinds of psychic organ which evolve from it in time. Only one single group of invertebrates has a similar structure : the rare, marine tunicata, copelata, ascidia, and thalidiae. These animals have other important peculiarities of structure (especially in the chorda and the gut) which show a striking di- vergence from the other invertebrates and resemblance to the vertebrates.
What to read after The Riddle of the Universe At the Close of the Nineteenth Century?
You can find similar books in the "Read Also" column, or choose other free books by Haeckel, Ernst Heinrich Philipp August, 1834-1919 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In every case a number of nerves branch off from this medulla in regular division, one pair to each segment or vertebra. In every case this medullary cord arises in the same way in the foetus ; a fine groove appears in the middle axis of the skin at the back ; then the par- allel borders of this medullary groove are lifted up a little, bend over towards each other, and form into a kind of tube.
The long dorsal cylindrical medullary tube which is thus formed is thoroughly characteristic of the v...er- tebrates ; it is always the same in the early embryonic sketch of the organism, and it is always the chief feat- ure of the different kinds of psychic organ which evolve from it in time. Only one single group of invertebrates has a similar structure : the rare, marine tunicata, copelata, ascidia, and thalidiae. These animals have other important peculiarities of structure (especially in the chorda and the gut) which show a striking di- vergence from the other invertebrates and resemblance to the vertebrates.
What to read after The Riddle of the Universe At the Close of the Nineteenth Century?
You can find similar books in the "Read Also" column, or choose other free books by Haeckel, Ernst Heinrich Philipp August, 1834-1919 to read onlineMoreLess
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