. Cunningham's Text-book of anatomy. Anatomy. STEUCTUEE OF THE SKIN. 857 N Stratum corneum ^^Stratum lucidum Stratum granulosum Stratum mucosum Stratum germinativum Nervous papilla of corium of the joints, and it can be thrown into wrinkles by the contraction of the sub- cutaneous muscles, where these exist. Over the greater part of the body it is freely movable; but on the scalp and lateral surfaces of the auriculae, as well as on the palms and soles, it is bound down to the subjacent tissues. The skin consists of two strata, viz.: a deep, termed the corium, and a superficial, the epidermis (
. Cunningham's Text-book of anatomy. Anatomy. STEUCTUEE OF THE SKIN. 857 N Stratum corneum ^^Stratum lucidum Stratum granulosum Stratum mucosum Stratum germinativum Nervous papilla of corium of the joints, and it can be thrown into wrinkles by the contraction of the sub- cutaneous muscles, where these exist. Over the greater part of the body it is freely movable; but on the scalp and lateral surfaces of the auriculae, as well as on the palms and soles, it is bound down to the subjacent tissues. The skin consists of two strata, viz.: a deep, termed the corium, and a superficial, the epidermis (Fig. 734). The corium or cutis vera is derived from the embryonic mesoderm, and consists essentially of a felted interlacement of connective tissue and elastic fibres. In its deeper part, or stratum reticulare, the fibrous bundles are coarse and form an open network, in the meshes of which are vessels, nerves, pellets of fat, hair follicles, and glands. This reticular stratum passes, as a rule, without any line of demarca- tion, into the panniculus adiposus or subcutaneous fatty tissue, but in some parts it rests upon a layer of striped or unstriped muscular fibres — the latter in the case of the scrotum. In the super- ficial layer, or stratum papillare, of the corium, the connective tissue- bundles are finer and form a close network. Projecting from its superficial surface are numerous finger-like, single, or branched ele- vations, termed papillae (Fig. 734), which are received into corre- sponding depressions on the under surface of the epidermis. These papillae vary in size, being small on the eye- lids, but large on the palms and soles, where they may attain a length of 225 p, and where they produce the permanent curved ridges already referred to. Each ridge usually contains two rows of papillae, between which the ducts of the sudoriferous glands pass to reach the surface. The papillae consist of fine connective tissue and elastic fibres, mostly arranged parallel to the l
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