On the structure and development of connective substances / by Thomas E. Satterthwaite.

  • Satterthwaite, Thomas E. (Thomas Edward), 1843-1934.
Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: On the structure and development of connective substances / by Thomas E. Satterthwaite. 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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    bundles or fibres; so, too, it does not appear that the state- meiit has ever been made that the neuroglia contains these peculiar bodies. The intermuscular tissue of the frog's thigh is also regarded by many as having no fibrils excepting those of elastic tissue. Thus we see that excepting only in the character of the corpuscles there is not much agreement among observers, and even on this po'int there is difference of opinion. It has seemed impossible to get a clear idea of these mat- ters in any other way than by a systematic study of each and every one of the forms, subjecting them as nearly as possible to the same method of examination. This accordingly has been done, and the main inquiries have been directed toward —1. The general character and dimensions of the corpuscles in each; 2. Their relations to one another; 3. The character of the intercellular substance. It is believed that the use of several new methods which do not appear to have been pre- viously used in investigating the connective substances has helped to throw light upon these obscure subjects. The con- sideration of each tissue will be taken up in the order in which it has been tabulated. Some observations on develop- ment of connective substances will then follow. 1. Mucous Tissue.—It is well known that this substance is seen to great advantage in the umbilical cord of the embryo, and the following method has been found best suited to dem- onstrate it. Take a small piece of cord at about the third month and immerse it a few weeks in Miiller's fluid; make a thin section through the very soft gelatinous part, then im- merse it a few minutes in distilled water to which subsequent- ly a few drops of acetic acid are to be added, so that the solu- tion shall not contain more than one per cent, of acid, and then mount in glycerine. It will then be seen that the soft- est portion contains numbers of irregularly-shaped flattened plates, some containing an oval, flattened nucleus, others hav- ing none that are apparent (Figure 2). Some of these flat- tened bodies anastomose by these processes with those of other plates; others are quite free. The substance lying be- tween the cells, the intercellular substance, is in the softest portions quite homogeneous or slightly granular, and has no