388 



THE ORGANS 



vertically disposed bands of connective tissue — the retinaculce cutis — 

 which serve to unite the corium to the underlying structures and 

 enclose fat lobules. In some parts of the body this subcutaneous fat 

 forms a thick layer — the pannicidus adiposiis. 



The Epideemis.- — This is composed of stratilied squamous 

 epithelium. In the comparatively thin skin of the general body sur- 

 face the epidermis is divided into two sublayers: (i) One lying just 

 above the papillary layer of the derma, and known as the stratum 





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Fig. 273. — From Vertical Section through Skin of Human Finger Tip. X200. 

 (Schafer.) a, Stratum corneum; b, stratum hicidum; c, stratum granulosum; d, stratum 

 germinativum. To the left a vascular papilla; to the right a nerve papilla containing 

 tactile corpuscle. 



germinativum (stratum mucosum — stratum Malpighii).; (2) the other 

 constituting the superficial layer of the skin — the horny layer or 

 stratum corneum. In the thick skin of the palms and soles two ad- 

 ditional layers are developed; (3) the stratum granulosum; and (4) 

 the stratum lucidum (Fig. 272). 



(i) The stratum germinativum consists of several layers of cells, 

 The deepest cells are columnar and form a single layer (stratum 

 cylindricum), which rests upon a basement membrane separating it 



