HEART. 
on one fide; the black blood, exhalations, fecretions, Kes, 
are fent out on the oppofite. 
The general communications of the capillaries explain the 
colour of parts of the body produced by its pofition after 
death, and the difappearance of rednefs from inflamed 
parts, in confequence of the blood retained in them by the 
vital powers, being afterwards actuated merely by phyfical 
impulfes. 
Und See the circumftances of fuch free communication, a 
we have already pointed get how does it happen that ann 
does not enter into “a 
comes in contaét with them? and why fhould the fkin abforb 
certain fubftances, and reje& others? All thefe phenomena 
an 0 
fenGibaity. which is in mee with one fubftance, and re- 
jects all others. Buta may. vary, the relation between 
any organ, and a es, forei n to it, is liable to corre- 
{ponding changes: thus a part of the capillary fyftem, which 
the biod, admits that fluid when its 
rejeQed enfibility has 
heen exa 
A feries of organized meh is eure by very different 
ry from thofe which 
‘borr owed from the ore 
soins 
aa progrefs ei fince the ee laws, which prefide 
wratr. yth } z me 1 
¥ aces ted for tl 
pe a ae 
; 5 reer see eae in- 
“Rumera) variations, in the fluids of the em, are 
_ Preceded and - oP tet in the 
_— -parietes, “Such alterations are not effec in the 
can penetrate into the larger veffels only. 
: of the excretories. 
ae the 
Sore. is moft co 
larger arterial and venous ramifications, where the fluids 
s, and too 
t aorta of an animal, which we may kill by 
opening that veffel, and immediately throw in any animal 
id; psyou will never find it fill the capillary fyftem, and 
e time dead. The inherent 
organic E fenfiblity of she: se repels the injection, which 
This experiment 
ave ee a edly without ever pg: in 
ens the eapillari 
influence the differences obferved in the vital properties, that 
in the organic fenfibility and the organic infenfible con- 
eraeliey of each fyftem: hence the particular modifications 
of the difeafes dependent on thefe properties, and  par- 
ticularly refiding in the a fuch as ee 
tumours, hemorrhage, & The diverfities of ftru 
in the capillary fyftem are fometimes mani ife! 
eye: the differences which can be difcer ned in the ars- 
ro aba of thefe-veflels are fpecified party 3 in the article 
nbd; to what we have there faid, we may add, that 
a etery piers fyftem in the body has its sneuia! charaéter 
in t ‘ 
The stbegpiey in the capillaries exhibits, according to the 
arrangement of re my two kin na: viz. the 
ac of it fluids, and the changes which they une 
“6 * The blood,” fays Bichat, bal iiabsende has arrived in the 
illary fyftem, is-manifeftly out of the smh of the heart’s 
SG tin en and its motion is continued onl 
fond to thofe of the arterie » and which cannot thestiote 
_ ‘This: affertion has. been 
ready proved with refpeét to the veins; it is aay: true 
entation and dim on of 
ions do not coincide with thofe of the ctliticas 
of the heart ; in violent febrile attacks the whole arterial 
fyftem. feems violeatly ae yet the funétions of the 
e formed. 
glans are et oe and no fluids he fweat 
ter the vi ra of fever have 
fubfided. \ fe ids is 
heen 
poured out in various dropfies, the heart's aGtion\is weak, 
That the circulation of the veflels fubfervient to nutrition 
is not derived from the contraction o: 
obvious. The latter force, uniform in the whole — fends 
sie: beat igs to all parts. Nutrition, on the co 
er fupply nd. therefore <a 
ier at ee time this Scivianait is vie ge ina 
date to 
ne part. Moreover, how can we 
agcommo 
fagle and. ae impulfion of the heart in ali parts, a4 
ammation, of eruptions, &c. in various 
3Mz organs ? 
