STRUCTURE OF THE SKIN 



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sebaceous and sweat glands. These products correspond al- 

 together to neither the secretions nor the excretions, and the 

 sebaceous glands have been described under the head of 

 secretion. It is to be remembered, however, that the sweat 

 usually represents part of the sebaceous as well as the sudo- 



Stratum corneum. 



Stratum lucidum. 

 Stratum granulosum. 



Stratum Malpighii. 



FIG. 60. Vertical section of the human epidermis. 



The nerve-fibrils, n, b, stained with gold chloride. (Landois.) 



riparous secretion, because the mixture of the two is a 

 physical necessity. It is the water of the sweat which is the 

 most important excretion from the skin, although the elimi- 

 nation of CO2 and inorganic salts, and especially of urea in 

 some pathological conditions, is not to be overlooked. 



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