HEART. 
ceration orerofion. Menftruation is a cafe of the fame kind, 
in which the blood is tranfmitted through the exhaling veffels 
rithout an ceginh or exhalation. .Various other fluids 
ts, and st the differences in the 
How greatly does the 
fferent € 
refer to Bichat’s Anatomie Generale. 
Exhalants are fometimes accidentally Ngee of which 
the formation of cyits furnifhes a remarkable e 
internal furface of thefe, which is pleat ay ime oth, pours 
out different kinds of uid, according | to the pe Ceee, fen- 
fibility of the part. Thi 
i ion between the pac sad fecreted fluids. 
latter are never accidentally “aehigt in cyits; we never 
meet with , preternatural collections of urine, faliva, femen, 
&ec.; while.it is not uncommon to find depofitions of ferous 
fluid, as in éencylted dropfies, of fat, as in fteatomatous and 
other tumours, of fynovia, as in ganglia. It would be ne- 
cell; to the production of fecreted fluids, that glands 
fhould be sacieaay developed in the body ; but their 
mplicated, and fuppofes the exiftence of 
of ex 
s continuous ¢ 
arteries, and no intermediate ak can be much more 
readily. piednerd in parts, to which ee are oo eX- 
two 
I ure is conical; As is on bafis a ‘E 
lar Latte which confine it = a psten fituation, 
is perfectly loo oofe and unconnected in the reft of its 
-It is-contained in a cavity lined by a ferous mem- 
peric 
brane called the ardium; which is alfo refle&ed over its 
furface. 
The pericardium lies in the cheft hebind the 5th, 4th, 3d, 
and 2d, ribs of the left fide, and between the two pleura, 
ere to it by means of -a loofe 
1e front, a very {mall portion, or 
-even none of its-furface, is sla y a little cellular mem- 
brane to the middle bone of the fternum. 
1s round er to rl dn . the 
rene correfponds to the flat furface of the heart si adbiees 
: ; a cone, of which the 
very round, and of which ie bafis, correfj 
of the heart, has a particular 
apex is 
ding to sat we 
elongation urrounding the 
‘ring feeraimds the inferior cava. He 
iS cornua. 
large veffels. The front region of this bag-is covered by the 
Pp eura, except at its middle, where the two lamine of the 
mediaftinum are approaching towards each other. It cor- 
refponds to the back of the iternum, and to the cartilages of 
the laft true ribs of the left fide, from which it is feparat ted 
laterally by the front of the lungs. The pofterior region, 
- which is the fmalleft in extent, correfponds immediately to 
The lateral regions are covered 
nerves of the 
then to the fuperior 
to the ductus iste, to ae left branch of thie crayons 
- artery, and each branch of the left pulmonary vein. 
it is attached to both of the right pulmonary veins, to oe 
left auricle, to both the left pulmonary veins, to the inferior 
cava, to the feptum of the auricles, to the right branch of - 
the pulmonary artery, and to the aorta under the origin of 
its great branches it embraces the latter veflel and the con- 
tiguous pulmonary artery in the form of a cylindrical fheath. 
But three-fourths only of the aorta are furrounded, becaufe 
the remainder, looking towards the pulmonary art 
heres to that veffel by means of cellular fubitance. 
rounds the fuperior cava in the form of a riyg, fo that the 
anterior and pofterior portions of the » perl ricardial cavity com- 
municate together between this vem and the aorta. A fimilar 
nce = are from fix 
to eight perforations in the pie ey ; 1, for the fuperior 
cava; 2, for the inferior cava; 3, for the Life poimon = 
tery; 4, for the right pulmonary artery ; 5» 4 7, 8, one 
two for the ulmonary veins on each a Yet we fhoold 
form an erroneous notion of the fubjeG, if we fuppofed th the 
the heart, we fhould have a complete membranous bags - 
the parts juft named would be clearly feen to be on_ its wa 
de. ‘The membrane, being ‘reflected over thefe veliels, near 
defcending te the heart, gives es them an pon? pat nr or 
that organ, When it is. inflated, . of eres ® 
a sea ack mare °F Be 
Defcending from “thefe 
comes much thinner and more de ate, ard 
by cellular fubftance to the whole erect 
heart, fo as to give it a fmooth dir oe bie of 
between this membrane and the , about the cours * 
- Sony veffels, more plentifully round the large’ -cleaeias 
more arin about the fmaller branches, ©: ni 
fxn mem: 
Te pet a white, denfe, and very branes 
