2 ib MUCOUS SYSTEM. 



tractility^ when a sialogogue acting on the extremity of 

 the salivary duct, induces a discharge of saliva from the 

 glands; another instance of this sympathy is, when the 

 mucous membrane on the tongue is furred in consequence 

 of disordered stomach ; and lastly, a very remarkable sym- 

 pathy of these properties with the mucous membranes is, 

 when the cutaneous organ sympathizes with them during 

 digestion. To the sympathies of insensible organic con- 

 tractility and organic sensibility, are to be ascribed the 

 haemorrhages which one mucous tissue assumes vicarious 

 to those of another portion of this texture. 



Q. In passive sympathies this tissue is influenced by 

 diseases of other textures, give examples of this. 



t#. In several diseases of other tissues you have burning 

 sensations in the mucous membranes of the mouth, bowels, 

 and stomach ; in some cases there is great thirst. Now, 

 in these cases the animal sensibility of the mucous tis- 

 sue is in passive sympathy. Again, the influence of cold 

 applied to the skin, on haemorrhage of the mucous tissue, 

 is a passive sympathy of the insensible organic contrac- 

 tility; so likewise are the catarrhs from exposure to cold, 

 and the effect of warm bathing in catarrh ; also the disor- 

 der of certain portions of the mucous membrane in some 

 diseases, as that of the throat in eruptive cases; lastly, the 

 diarrhoea in chronic diseases, and the pectoral haemor- 

 rhages in the last stages of organic diseases; these are all 

 passive sympathies of the insensible organic contractility 

 of the mucous membranes. 



Q. Why are there not sympathies of the other vital 

 properties in the mucous texture? 



t#. Because these properties are either not in existence, 



