148 CAPILLARY SYSTEMS. 



*#. It is probable that they partake of the structure of 

 the different organs; that they have peculiar organic sen- 

 sibility, and insensible organic contractility, and conse- 

 quently peculiar diseases. 



Of the. Capillary Circulation. 



Q. What are the features of this? 



.#. Two conspicuous ones invite attention; they are the 

 motions of the fluids, and the alterations they undergo. 



Q. What are these fluids? 



/!?. The blood, which is known; the other fluid in ca- 

 pillary circulation is unknown. 



Q. How are the fluids circulated in the capillaries? 



&. Not by the heart; but the fluids coming in contact 

 with the capillaries, excite through their organic sensi- 

 bility, the insensible organic contractility which propels 

 them. 



Q. What objections are there to the doctrine of the 

 heart's agency in the capillary circulation? 



#. The vessels of the capillary circulation exhibit a 

 motion different from that of the heart and arteries; where 

 the heart's action is increased, the exhalations are not, and the 

 secretions are actually diminished; in some haemorrhagies 

 the pulse is very weak; the existence of local external dis- 

 eases, and the inequality of growth in different parts; all 

 these invalidate the doctrine alluded to in the question, 

 and substantiate the opinion that the capillaries act inde- 

 pendently. 



Q. Founding the division on the circulation of the 

 blood, and that of the capillaries, how do you divide dis- 

 eases? 



