CHAPTEE XV 



HUMAN SKIN, HEART MUSCLE, AND 

 HUMAN BONE 



Human Skin. 



c nnHE skin consists chiefly of the exterior 



*-*- epithelium, called also cuticle or epi- 

 dermis, and the corium, derma, or Gutis vera. 



1 Below the corium are embedded several 

 organs with special functions, namely, the 

 sudoriferous glands, sebaceous glands, and 

 hair follicles. On the surface of the skin are 

 sensitive papillae. 



'The so-called appendages of the skin the 

 hair and nails are special modifications of the 

 epidermis. 



1 The epidermis j or epithelium, which covers 

 the true skin, is composed of several strata of 



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