1156 



THE ORGANS OF SPECIAL SENSE 



between rows of papillae, and open on the curved surface ridges (Fig. 865). Most 

 of the papillae contain loops of capillaries, and are called vascular papillae. Some 

 contain nerve terminations, and are called nerve papillae. Between the papillary 



Stratum corneum. 



Stratum lucidumA 

 Stratum granulosum.[ 



Stratum mucosum 

 Matpighii. 



Stratum germinativumA 



-Nerve fibrils. 



FIG. 867. Section of epidermis. (Ranvier.) 



layer of the corium and the epidermis is a very thin and structureless membrane 



called the basal membrane. 

 The deep or reticular layer (stratum reticular e) rests upon the subcutaneous 



tissue. It passes superficially into the papillary layer, and at most places into 



the subcutaneous tissue without a sharp 

 line of differentiation. At some places, 

 for instance in the nipple, the deep 

 layer of the corium rests upon a layer 

 of muscle tissue. In the face this 

 muscle tissue is striated and sends pro- 

 longations to the papillary layer; in the 

 nipple and scrotum it is nonstriated. 



ARRECTOR 

 PILI MUSCLE 



EPIDERMIS 



The reticular layer is composed of bun- 

 dles of white fibrous tissue, arranged 

 in a network. In the meshes of the 

 network are fat, bloodvessels, lymphat- 

 ics, sebaceous glands, sweat glands, 

 and hair follicles. 



The subcutaneous areolar tissue, or 

 tela subcutanea (panniculus adiposus), 

 connects the skin to the parts beneath; 

 it is composed of bundles of connective 

 tissue which cross repeatedly and form 

 In almost all regions the spaces contain fat, but in the scrotum, exter- 



SUDORIFEROUS 

 GLANDS 



SUBCUTANEOUS 

 AREOLAR TISSUE 



FIG. 868. Vertical section through the skin of the 

 trunk in the region of the arch of the ribs. One 

 of the small hairs is seen in longitudinal section 

 (Toldt.) 



spaces. 



nal ear, penis, and eyelid they do not contain fat. When the connective-tissue 

 fibres of the panniculus adiposus are long and nearly parallel to the skin surface, 



