The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
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Page 13
... increases only by the external apposition of new particles , a cell grows both by that method and by the intussusception of new matter between the particles already deposited . The difference , he says , is yet more marked in the ...
... increases only by the external apposition of new particles , a cell grows both by that method and by the intussusception of new matter between the particles already deposited . The difference , he says , is yet more marked in the ...
Page 18
... increased in size , modified in shape , and crowded with a mass of nucleated cells in their interior , through the agency of which the walls of the corpuscles and the hyaline matrix became absorbed . He also gave illustrations of the ...
... increased in size , modified in shape , and crowded with a mass of nucleated cells in their interior , through the agency of which the walls of the corpuscles and the hyaline matrix became absorbed . He also gave illustrations of the ...
Page 29
... increases in size cotemporaneously . The loops next become not so tightly coiled , and form the loose skein , though the individual fibres thicken and shorten . A most important 1 Proc . Phil . Soc . , vol . xix . , Glasgow , 1888 . 2 ...
... increases in size cotemporaneously . The loops next become not so tightly coiled , and form the loose skein , though the individual fibres thicken and shorten . A most important 1 Proc . Phil . Soc . , vol . xix . , Glasgow , 1888 . 2 ...
Page 43
... increase in others ; and in this way would tend to affect either the form of the entire organism , or the form and relations of its constituent parts , or perhaps both . Should such modifying influences come into operation either before ...
... increase in others ; and in this way would tend to affect either the form of the entire organism , or the form and relations of its constituent parts , or perhaps both . Should such modifying influences come into operation either before ...
Page 44
... increased or decreased demands on the working of certain organs . As we therefore pass along a series of genetically connected animals , we should find , pari passu with the environment and the functional demands of the organism , the ...
... increased or decreased demands on the working of certain organs . As we therefore pass along a series of genetically connected animals , we should find , pari passu with the environment and the functional demands of the organism , the ...
Common terms and phrases
acquired characters Actinozoa adult alimentary Amphioxus Anatomy ancestral Annelid ants appear archenteron assume become blastopore body Burchell's zebra carapace-length cavity changes chromatin cœlom colour connection corpuscles degeneration dentary derived deviation differentiation diploblastic disuse division ectoderm eggs embryo essay evolution excretory existence explanation fact females fibres formation frontal breadth germ germ-plasm growth homologous horse hybrid hypothesis important insects instance instincts larva larvæ legs less males mare mean mesoblast Metazoa modified morphological mouth and anus natural selection nephridia nervous system neural canal nucleus number of glands nutrition observations occur ontogeny organs origin ovum Panmixia Peripatus plants plasm pores pouches present primitive streak principle produced Professor Weismann protoplasm recognised regard reproductive cells result Schwann Sedgwick segmentation nucleus segmented animals somites specialised species Spencer stage structure substance supposed telegony theory tion tissues unicellular variability variations Vertebrata Vertebrate workers yolk zebra
Popular passages
Page 65 - The elementary parts of all tissues are formed of cells in an analogous, though very diversified manner, so that it may be asserted, that there is one universal principle of development for the elementary parts of organisms, however different, and that this principle is the formation of cells.
Page 7 - XVIII. OF THE SCHEMATISME OR TEXTURE OF CORK, AND OF THE CELLS AND PORES OF SOME OTHER SUCH FROTHY BODIES...
Page 72 - PROCESSES, AND COLLATERAL INFORMATION IN THE ARTS, MANUFACTURES, PROFESSIONS, AND TRADES, INCLUDING MEDICINE, PHARMACY, AND DOMESTIC ECONOMY ; designed as a General Book of Reference for the Manufacturer, Tradesman, Amateur, and Heads of Families.