Copy 1, Volume 1

Elements of anatomy / by James Quain ; Edited by Richard Quain and William Sharpey.

  • Jones Quain
Date:
1848
Catalogue details

Licence: Public Domain Mark

Credit: Elements of anatomy / by James Quain ; Edited by Richard Quain and William Sharpey. Source: Wellcome Collection.

    41/978
    once be struck with the resemblance. Fig. 6’, 8 and c, shows the subsequent changes on the pri- Fig, 5.* mary cells of cartilage; the pa- rietes are seen to have become thickened by deposit of fresh material, the spaces within the cells are consequently diminish- ed, while the mass between the cavities is increased. Now this change seen to occur in the car- tilage cells, though there may be a question as to the precise mode in which it is brought about, may very fairly be compared with the thickening of the sides of the vegetable cells, which takes place when they are converted into the woody and other Fig. 6.’+ cae, * ‘ a CWA Cy A\IC) Sf ( \ JT ye — Best G3 hard tissues. Again, in most cartilages the cells increase in number as they diminish in size, new ones being formed within the old, as happens in many vegetable structures. The instance now given, and others to the same effect which will be mentioned as we proceed, tend to show the fundamental resemblance of the process of textural development in the two kingdoms; but, when we come to inquire into the various modifications which that process exhibits in the formation of par- ticular textures, we encounter serious difficulties. The pheno- mena are sometimes difficult to observe, and, when recognized, they are perhaps susceptible of more than one interpretation ; hence have arisen conflicting statements of fact, and differences of opinion at present irreconcileable, which future inquiry alone * Section of a branchial cartilage of a Tadpole, showing the early condition of the cells ; magnified 450 diameters. (Schwann.) + Cartilage of the branchial ray of a fish (Cyprinus erythrophthalmus) in different stages of advancement ; magnified 450 diameters. (Schwann.)