A probationary essay on the formation of new blood-vessels : submitted, by the authority of the President and his Council, to the examination of the Royal College of Surgeons of Edinburgh, when candidate for admission into their body, in conformity to their regulations respecting the admission of ordinary Fellows / by Allen Thomson.

  • Thomson, Allen, 1809-1884.
Date:
[1832]
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Licence: Public Domain Mark

Credit: A probationary essay on the formation of new blood-vessels : submitted, by the authority of the President and his Council, to the examination of the Royal College of Surgeons of Edinburgh, when candidate for admission into their body, in conformity to their regulations respecting the admission of ordinary Fellows / by Allen Thomson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    blooded animals. In Birds and Mammalia, very few if any instances are known of the reproduction of organs of a com- pKcated structure, or of parts of the body, such as the limbs, &c. composed of various textures; and indeed it may also be affirmed that examples of the true reproduction of individual textures in these animals are very rare and to no great ex- tent. ^ That true regeneration of some of the textures, as for example of cellular substance, of bone, ligament, skin, nerves, and bloodvessels, is to be met with in Man, and the animals resembling him, seems now to be incontestibly proved ; but, in such instances, the reproduction is very partial and im- perfect, and very different from that which occurs in the lower animals. Of all the textures of the human body the cellular seems to be the most easily and rapidly reproduced; and this sub- stance, or one very analogous to it, is not only formed when parts of the texture itself have been destroyed or removed; but it also serves to replace some of the other parts of the body which seem themselves to be incapable of a rapid or of any reproduction. In all these instances of the reproduction of parts of ani- mals that had been removed or destroyed, a new substance is thrown out from the place of the solution of continuity, and this substance, sprouting out from the living surface, is gradually converted, more or less completely, into the tex- tures, and acquires the form and structure of the part the place of which it supplies. Though there appears to be con- siderable variety in the animals that have been alluded to, in respect of the facility of reproduction, or the rapidity and perfection with which the parts reproduced acquire their ul- timate form and structure, the mode in which this is effected \ J* Murray, Commentat. de Redintegratione partium Corp. Ani- maL Getting. 1787. Otto Huhn, Comment, de Redinteg. partium Mol- Uum in Vulnere. Getting. 1787- Dr John Gordon, Tentam. Med. de Vulnere Naturae Sanando. Edin. 1805. A 2