239 ) 



MUCOUS SYSTEM. 



Q. Why is this called the mucous system? 

 fl. From the fluid which is found on the surface of the 

 tissue which composes it. , 



Of the Divisions and Form of the Mucous System. 



Q. In what form does this texture appear? 



/2. Always in a membranous form. 



Q. Where are these membranes found? 



ft. They line all the interior surfaces which communi- 

 cate externally. 



Q. How are these membranes generally divided? 



/?. Into the gastro-pulmonary and genito-urinary. 



Q. Is there no mucous tissue which is not embraced in 

 these two divisions? 



/?. There is a small mucous surface in the tubes of the 

 nipple. 



Q. Give a general view of the gastro-pulmonary mucous 

 membrane. 



/#. It lines the mouth, nose, anterior face~of the eyes, 

 the ducts of the glands of the mouth and throat; it lines 

 the Eustachian tube, the trachea, lungs, the oesophagus, 

 stomach, the biliary, pancreatic and cystic ducts, the in- 

 testines, and finally unites with the skin at the rectum. 



Q. Give a similar view of the genito-urinary mucous 

 membrane. 



A. This is spread in men on the urinary canals up to 



