The Shipley Collection of Scientific Papers, Volume 331890 - Zoology |
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Results 1-5 of 64
Page 11
... whole subject ; and in 1839 Theodore Schwann published1 his famous researches into the structure of animals and plants , in which he announced the important generalisation that the tissues of the animal body are composed of cells , or ...
... whole subject ; and in 1839 Theodore Schwann published1 his famous researches into the structure of animals and plants , in which he announced the important generalisation that the tissues of the animal body are composed of cells , or ...
Page 16
... whole embryo at a subsequent period is com- posed of cells , filled with the foundations of other cells . Although we may not agree with all the details given by Barry in his account of these observations , yet there can be no doubt ...
... whole embryo at a subsequent period is com- posed of cells , filled with the foundations of other cells . Although we may not agree with all the details given by Barry in his account of these observations , yet there can be no doubt ...
Page 25
... whole , but the division is restricted to the protoplasm contained within it . A cell with a membrane is , he says , like an encysted Infusorian . Taking the embryonal cell as a type , he believed that both the nucleus and the proto ...
... whole , but the division is restricted to the protoplasm contained within it . A cell with a membrane is , he says , like an encysted Infusorian . Taking the embryonal cell as a type , he believed that both the nucleus and the proto ...
Page 26
... whole group of phenomena characteristic of an independent organism could be recognised . Stricker held that protoplasm may be fluid , solid , or gelatinous . It exhibited the phenomena of movement , of nutrition , of growth , and the ...
... whole group of phenomena characteristic of an independent organism could be recognised . Stricker held that protoplasm may be fluid , solid , or gelatinous . It exhibited the phenomena of movement , of nutrition , of growth , and the ...
Page 28
... whole question of the relation of the nucleus to the life of the cell , more especially in con- nection with the production of young cells , assumed a much more definite form when it was discovered that the chromatin nuclear fibres took ...
... whole question of the relation of the nucleus to the life of the cell , more especially in con- nection with the production of young cells , assumed a much more definite form when it was discovered that the chromatin nuclear fibres took ...
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.