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.

    131/376 (page 111)
    WHITE FIBROUS TISSUE, 11] texture closely resembling certain forms of white fibrous tissue, there are some fibres exhibiting the re- actions of yellow elastic tissue. These fibres diflfer in character and number in different cases. Some of them consist of elastic tissue developed from nuclei or masses of bioplasm, as will presently be described. But in many cases these fibres are probably the re- mains of nerve fibres or capillary vessels Avhich had been active at an earlier period of life, while, in some instances, they result from the prolongations of the bioplasm being converted into imperfectly developed fibrous tissue, which, like bioplasm itself, is not ren- dered transparent and caused to swell up by the action of acetic acid. 162. White fibrous tissue consists of a firm, hard whitish material which becomes converted into gela- tine by boiling. The toughness and resisting pro- perty of skm depend upon this tissue. The bioplasm of all kmds of white fibrous tissue may be shown to be continuous with the fibrous tissue or formed ma- terial. If a small portion of white fibrous tissue, as tendon, be examined at a very early period of de've lopment under a power of 200 diameters, it will be found that it is composed of oval masses of bioplasm with a very httle intervening fibrous structure. At a still earHer period of its existence, it contained a still larger proportion of bioplasm. As growth proceeds, the fibrous material mcreases, and the bioplasm rela- tively decreases, so that when it reaches its adult form the prmcipal portion of the structure consists of fibrous material, and there is comparatively only a very small amount of bioplasm. To state this more clearly-In equal portions of young and adult tendon the proportion of bioplasm is very difPerent. There niay be five or six times as much in the former as S the latter This important fact will be demonstrated qmte easily if a piece of young tendon be' contrS ed with a portion from an old subject. The contrast be-