CLASSIFICATION OP THE TLUID9. 55 



linguished into those which are taken up by lymphatic or venous absorption, and carri- 

 ed back into the torrent of the circulation, and into these which are entirely thrown out 

 of the body ; the former being usually denominated recrementitial, the latter excrementi- 

 tial, from these circumstances. 



The recrementitial fluids are all produced in cavities or in situations that have no ex- 

 ternal outlet. The following enumeration includes all the fluids appertaining to this 

 genus : 1 Serona fluids, as those which are exhaled on the surface of the arachnoid, 

 of the pleura, of the pericardium, the peritoneum and the tunica vagmalis. 2 Tho 

 Synovia. 3 The ncrosity of luminous tissues. The/a* formed in the adipose tissue. 

 5 The marrow, or medullary juice. 6 Q The colouring humour of the skin, placed un- 

 der the epidermis. 7 The colouring humours of the ins, of the uvea, and of the cho- 

 roid. 8 The three humours of the eve the aqueous, crystalline, and vitreous 9 The 

 Ivmph of Cotug?io.lQ The fnanmtr of the lymphatic glands, a gelatmo.albuminous fluid, 

 existing in the spongy tissue of their organs. 11 and lastly, the fluid perspired on the 

 internal surface of all the vessels, the existence of which may be doubted, as it is next 

 to impossible to demonstrate its existence. In addition to the perspired recrementitial 

 fluids may be added those which exist in the human ovum, viz. the amniotic fluid ; the 

 -water of the chorion, which exists between thechorion and amnios, only during the early 

 months of pregnancy ; and the -water of the umbilical vesicle, which may be compared to 

 the yolk of an egg, and which some physiologists believe destined to nourish the em- 

 bryo before the developement of the placenta. 



The excrementitial perspired fluids are all thrown otf' from the external surface of 

 the body, and from the mucous membranes which have a communication externally by 

 means of the natural outlets, and which may therefore be considered as merely form- 

 ing parts of the external surface. l c Those fluids -which perspire from theski.n, as the cu- 

 taneous insensible perspiration, and the humour constituting the sweat 2 The fluids 

 per spired from the respiratory apparatus ; these differ somewhat in different situations, as 

 in the nasal cavities, in the trachea, and bronchia- 3 Q The humours exhaled on the sur- 

 face of the digestive canal. 4 Those humours exhaled on the internal surface of the uri- 

 nary apparatus, viz. on the internal surface of the ureteis, the bladder, and urethra. 

 5 The fluids exhaled from the genital organs, namely from the internal surface of the 

 vesiculx seminales and ejaculatory conduits, in the male, and from the nterus and va- 

 gina in females (the menstrual flux and the lochise.) 



B. The Secreted FoUicular Fluids are those formed by a particular secreting organ 

 called follicular. They are all excrementitial, and consequently are formed on, and 

 eliminated from, the two external suifaces of the body the skin and mucous mem- 

 branes. They consist of 1. The sebaceous humour of the skin. 2 The cerumen ; 

 the humours of Meibomius. 3 The humour of the caruncula lachrymalis. 4 The hu- 

 mour secreted at the base of the glans penis in the male, and on the surface of the 

 vulva in the female. The humours secreted by the follicles in the mucous surfaces are 

 generally characterized by the generic term mucous. They are distinguished into the 

 mucus of the respiratory organs, the mucous of the digestive apparatus, of the urinary ap- 

 paratus, and of the genital organs. The humours formed by the prostate, and by the 

 glands of Co-wper compound and glandiform follicles are usually referred to the last 

 mentioned in this enumeration. The fluid secreted by the tonsils is generally classed 

 \vith those of the digestive organs. 



C. Lastly. The Secreted Glandular Humours are the production of glandular organs. 

 They are 1 The lachrymal fluid. 2 Q The salivary fluid. 3 The pancreatic AM- 

 mours. 4 The bile. 5 The urine 6 The semen / and 7 Q the milk. 



It may be remarked generally with respect to the humours, that the degrees of fluid- 

 ity which belonging to them, vary greatly from a state of gas or of vapour, to that of 

 semi-fluidity : they have, moreover, all the physical conditions constituting a fluid 

 body. Their fluidity, however, does not result from the general forces of matter, but 

 from those of life. Indeed the vital influence modifies their physical form of existence, 

 in a more or less marked manner, as long as they continue subjected to its operation. 

 Prom this source also they are imbued with a certain influence, the presence of which 

 indicated by the continuance, for a time, of the specific characters of each. This in- 

 fluence, being no longer, renewed when they are removed from the body, soon be- 

 comes dissipated, and the secretion which, while within the sphere of the animal sys- 

 tem and for a short time afterwards, possessed an emanation of the vital influence suffi- 

 cient to give it certain characters, and to preserve it from the chemical changes to 

 which its constituents are naturally prone, at last falls into a state of dissolution, as u ic- 

 quivocal as that evinced by the te'xtures of the body. In confirmation of this view, we 

 need only refer the Physiologist and Pathologist to the comparative condition of the 

 more perfectly elaborated secretions immediately after their formation and excretion. 



