Bioplasm : an introduction to the study of physiology & medicine / by Lionel S. Beale.

  • Beale Lionel S. (Lionel Smith), 1828-1906.
Date:
1872
Catalogue details

Licence: Public Domain Mark

Credit: Bioplasm : an introduction to the study of physiology & medicine / by Lionel S. Beale. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    EPITHELIUM AND ITS BIOPLASM. embryo leaf consists. The bioplasm is perfectly transparent and looks like pure water. The cavity in which it lies has been termed a space or vacuole which was supposed to be occupied by mere passive fluid. ±5ut the colourless material is living bioplasm, and so important that the waUs of the spaces (cellar waUs) could not have been formed except by its agency. 32. Cartilage and its bloplasiu.—In a piece of cartilage or gristle it is easy to see the little masses of transparent structureless bioplasm, and distino'uish these from the firm cartilage material which inter- venes, and which has been formed by them. The structure of cartilage will be again referred to. 33. Epitliellum and its bioplasm.—If a little of the soft matter be removed from the inside of the cheek, and examined under a magnifying power of two hundred diameters, it will be found to consist of numerous little particles (elementary parts or cells), every one of which contains in the central part an oval mass of living matter, around which is a firmer material that has been formed by the bioplasm, and was deposited layer within layer. Often very distinct concentric rings may be seen, owing to this mode of deposition. The younger the particles of epithelium* the larger is the mass of soft colourless living bioplasm in proportion to the formed material of which the outer part consists, and which has ceased to manifest vital properties or powers. 34. Mucus and its bioplasm,—If a little viscid mucus be coughed up and examined under the mi- croscope it will be found to be very ti-ansparent, and to exhibit streaky lines here and there. At short dis- tances will be observed oval particles of transparent * Epithelium, from ini upon, and 9a\\w to sprout, for it used to be su])po?ed that epithelium grew or sprouted from membrane. Epithelium really is fonned by biojilasm which sprang from ]3reexisting bioplasm ; the bio]ilasm existed before the membrane aud therefore coidd not have sprung from it.