The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
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Page 19
... evidence of activity in the part . He saw bile and other secre- tions within cells , and stated that when the products of secretion can be seen within a cell , they are accumulated in the portion which corresponds to the nucleus as ...
... evidence of activity in the part . He saw bile and other secre- tions within cells , and stated that when the products of secretion can be seen within a cell , they are accumulated in the portion which corresponds to the nucleus as ...
Page 20
... evidence in the blood of the embryo pig , and saw both in the blood of the horse and of man red blood - cells formed in the interior of large mother cells . It is customary in Germany to credit Remak with being the first to recognise ...
... evidence in the blood of the embryo pig , and saw both in the blood of the horse and of man red blood - cells formed in the interior of large mother cells . It is customary in Germany to credit Remak with being the first to recognise ...
Page 22
... evidence in support of this position , that the theory of free cell formation was shortly after abandoned in connection with pathological processes , as it had been some time previously by most observers in normal histiogenesis.4 1 Op ...
... evidence in support of this position , that the theory of free cell formation was shortly after abandoned in connection with pathological processes , as it had been some time previously by most observers in normal histiogenesis.4 1 Op ...
Page 31
... evidence that such a rearrangement of its con- stituent parts takes place as to give to each daughter cell one - half of the protoplasm from each pole of the mother cell . It is probable that each daughter nucleus simply becomes ...
... evidence that such a rearrangement of its con- stituent parts takes place as to give to each daughter cell one - half of the protoplasm from each pole of the mother cell . It is probable that each daughter nucleus simply becomes ...
Page 38
... evidence in certain plant cells that such is the case ; Rabl concludes , from observations on the epidermic cells of Salamander , that the loops of chromatin fibres are constantly twenty - four in number in the same kind of cell in the ...
... evidence in certain plant cells that such is the case ; Rabl concludes , from observations on the epidermic cells of Salamander , that the loops of chromatin fibres are constantly twenty - four in number in the same kind of cell in 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.