. Elementary physiology . Fig. 93.—Duct of a sweat-gland passing through the epidermis. (Magnified 200 diameters.) (Heitzmann.) BP, papillae with blood-vessels injected ; V, rete mucosum between the papillae ; E, stratum corneum ; PL, stratum granulosum ; D, sweat-duct, opening on the surface at P. the blood-vessels which form capillary networks in the super- ficial part of the ctUis vera projecting into the papillae.^ The outer free surface of the epidermis is also thrown into ridges corresponding to these, but not so deeply marked, which form the fine markings seen on the finger tips and els
. Elementary physiology . Fig. 93.—Duct of a sweat-gland passing through the epidermis. (Magnified 200 diameters.) (Heitzmann.) BP, papillae with blood-vessels injected ; V, rete mucosum between the papillae ; E, stratum corneum ; PL, stratum granulosum ; D, sweat-duct, opening on the surface at P. the blood-vessels which form capillary networks in the super- ficial part of the ctUis vera projecting into the papillae.^ The outer free surface of the epidermis is also thrown into ridges corresponding to these, but not so deeply marked, which form the fine markings seen on the finger tips and elsewhere. Thus no blood-vessels enter the epidermis, but its deeper layers, where ^ It is in this layer that the pigment is developed which gives colour to the skin in coloured people, ^ The papillae also lodge the terminations of the sensory nerve fibres for tactile sensation.
Size: 2391px × 2090px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpubli, booksubjectphysiology
