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SEROUS SYSTEM. 



Q. Why is it so called ? 



.#. From the kind of fluid that constantly lubricates 

 one of its surfaces. 



Of the Extent, Forms, and Fluids of the Serous System, 



Q. Name the principal serous membranes. 



^?. They are the peritoneum, the pleura, the pericar- 

 dium, the arachnoides, the tunica vaginalis testis. 



Q. What form does the serous tissue assume ? 



Jl. Always that of membrane. 



Q. What distinctive observation here arises between 

 the serous and mucous membranous expansions? 



#. The serous membranes are spread out over the ex- 

 ternal surface of the organs; the mucous membranes line, 

 the interior of the organs. 



Q. Which is the most extensive system of the two? 



&. The serous tissue. 



Q. Mention another distinguishing trait in these two 

 tissues. 



#. The serous tissues pour out, by exhalation, an albu- 

 minous fluid; the mucous tissues secrete mucus. 



Q. Does the serous surface exceed the cutaneous in 

 extent? 



A. It does; it is even probable that the serous exhala- 

 tion exceeds in quantity the fluid prepared on the cuta- 

 neous and pulmonary surfaces collectively. 



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