. A practical treatise on diseases of the skin, for the use of students and practioners . system of lymphatics, and by numerous medullated andnon-medullated nerves. Pars Reticularis.—The reticular layer of the corium is madeup, as has been seen, of interlacing connective-tissue bundles, withinterspaces increasingly larger from without inward. The fineness ofthe bundles increases, on the contrary, from within outward, beingfinest where the minute papilhe of the corium project into the rete,and coarsest near the subcutaneous tissue. Pars Papillaris.—The papillary layer of the corium lies inconta
. A practical treatise on diseases of the skin, for the use of students and practioners . system of lymphatics, and by numerous medullated andnon-medullated nerves. Pars Reticularis.—The reticular layer of the corium is madeup, as has been seen, of interlacing connective-tissue bundles, withinterspaces increasingly larger from without inward. The fineness ofthe bundles increases, on the contrary, from within outward, beingfinest where the minute papilhe of the corium project into the rete,and coarsest near the subcutaneous tissue. Pars Papillaris.—The papillary layer of the corium lies incontact with the rete above, and is connected below with the deeperreticular portion of the true skin. Between the rete and the papilla?of the derma a hyaline substance is interposed which Unna believesmay be identical with the so-called cement-substance described asseparating the fibrillar of the corium. The basal membrane once THE CORIUM, 23 thought to be stretched between the rete ruucosum of the epidermisand the papillary layer of the corium, cannot be demonstrated toexist. Fig. Yascular and nervous papillce. a, vessel; b, nervous papilla; c, vessel ; d, nerve-libre ; e, cor-pusculum tactus; /, transversely divided nervous filaments ; g, epithelia of rete. (After Biksiadecki.) The name of this portion of the derma is intended to describe itschief characteristic, the existence of numerous digital prolongationsof the corium, made up of delicate fibres of connective tissue, whichdo not interlace, and are abundantly provided with nuclei. Thepapillae spring each from a single, or several from a common, ovoidbase; their bulbous, conical, or blunt apices reaching into the rete,which also dips down between them. They differ in size in differentparts of the body, and also in their disposition and shape, being inplaces arranged in linear series, and in others in concentric whorls,with definite centres, producing thus crossing furrows, visible to thenaked eye as markings upon the o
Size: 1521px × 1642px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorhydejame, bookcentury1800, bookdecade1880, bookyear1888
