. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SEROUS AND SYNOVIAL MEMBRANES. 519 In the following sketch, such details as are more or less common to the synovial mem- branes in general will chiefly be treated of. For a description of their more salient pecu- liarities in the different joints, the reader is referred to the articles headed with the names of the several articulations. The epithelium of these structures presents characters which afford some grounds for distinguishing it both from that of the bursal and serous membranes. It forms, for the most part, but
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SEROUS AND SYNOVIAL MEMBRANES. 519 In the following sketch, such details as are more or less common to the synovial mem- branes in general will chiefly be treated of. For a description of their more salient pecu- liarities in the different joints, the reader is referred to the articles headed with the names of the several articulations. The epithelium of these structures presents characters which afford some grounds for distinguishing it both from that of the bursal and serous membranes. It forms, for the most part, but one layer, the forms of the constituent cells of which vary to the same extent as those witnessed in the bursae. But the broad, squamous, polygonal epithelia are comparatively rare ; and in by far the larger extent of its surface, the predominant shape is that of a slightly flattened spheroidal, or oval, or somewhat angular cell, such as the majority of those represented in Jig. 399, in Fi%. 399. a. Epithelium of Synovia! Membranes. a, free surface seen iu situ; b, separated cells. {Magnified 200 diameters.) some of which are seen decussations of two convex outlines, caused by the margin of one cell slightly overlapping that of its neighbour. Acetic acid exerts an unusual effect upon the cell-membrane, swelling up its outline very much before dissolving or rupturing it; an appearance which obtains in the more flat- tened and polygonal epithelia of the serous membranes, but, so far as I have seen, in a much smaller degree. Like those of the bursse, they are firmly attached to the .sub- jacent tissue, and possess little mutual ad- hesion ; though here and there a cluster of two or three more polygonal than usual may be found. Cytoblasts are rare, the cells ap- pearing to be completed by the addition of the outer membrane when yet extremely small, (fig. 399. b.) All these peculiarities might perhaps be generalized in the statement, that the cells which cover the general surface o
Size: 1801px × 1387px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, booksubjectanatomy, booksubjectphysiology, booksubjectzoology
