H-E.A-R-T. 
‘dif. 
produced only through the medium of the air which is fent 
to that organ with the blood 
The fun@tions of the lun 
change in the blood received from the right fide of the 
: the latter, therefore, influences the former molt 
powerfully, ‘as it fupplies the blood in which thefe changes 
are produced; and, confequently, the interruption of its 
action, by cutting off that fupply, puts a ftop to the 
chemical phenomena of the lungs. ‘The heart of red bleod, 
by acting on the brain, affe€ts the mufeles concerned in re- 
fpiration ; and thereby influences the mechanical phenomena 
s confift in producing a certain 
of that funétion. 
The heart has no lefs influence over the organs of the 
i neral, than over the brain and lungs. 
the motion which it 
commotion annihilating its action. In this manner a wound 
of the heart, or the burfting of an aneurifm, fuddenly fufpend 
our relations to external objeGs. i 
arteries i ubftance, and neceffary to the execution of 
their functions. ‘The functions of the organic life, fuch as 
wh it be black or red; that circumftance belongs to 
the account of the pul functions. 
“ Whenever,”’ fays Bichrat, the heart ceafes to act, general 
death comes on in the following manner ; the aétion of the 
brain is annihilated at firft for want of excitation : hence 
the fenfations, locomotion, and the voice, which are un 
the immediate influence of the brain 
: rdinary infl 
n. All the animal ‘life is fuddenly fufpended, and, at 
the inftant of the heart’s death, man ceafes to exiit with re- 
ing objects i 
lation to furroundin 
for their developenient’; fo that 
phenomena are interrupted dire&tly, 
indire&tly, and ehrbugh 
neral death then 
thé fecretions, the exhalations 
influence of the heart. 
- nal life, its powers ftill fubfift fome time after the fun@i 
“aneuriim, on 
fluid, and neceffary for its fupport, ceales ; 
it ftops fubfee 
quently in the white organs, which are lefs pe he 
fubje& to the 
inter. 
fom nctions 
afed ; the organic ee the organie con- 
; while, on the contrary, the influence of the brain is 
neceflary in the fenfations and voluntary motions. 
«This is the order in which the phenomena of general death 
fucceed each other, when they depend on the burfting of an 
i a wound of the heart, or any large blood-veflel, 
We die in the fame 
, Where an indi- 
‘manner. The faintings produced by lively mental emotions 
are analogous, in all their phenomena, to thofe cau 
organic affections of the heart, which obvioufly owe ef 
origin to this organ. Thefe mental caufes very often give 
rife to difeafes of the heart, but not to thofe of the brain. 
The brain has no direé&t influence on the circulation; there 
is no reciprocity between them. Affe 
do not 
ions 
art, and never in the brain: here 
affected organ is readily diftinguifhed, becaufe a fingle part 
begins re 
which ends 
bral action ceafe ; 
: ie 
“In other cafes the functions of the heart do not ceafe th 
in 
the various morbid affe@tions, whether chronic ago 
; j they are never loaded with b oe 
difeafe exiffed in them previoufly, they are com. 
pees of the cheft, and er pire Lietage er 2 
fi reafon may be affigned for this anatomic®, ” 
The circulation being fuddenly interrupted, infead of 
