Bauhaus-Universität Weimar

The Cyclopaedia of Anatomy and Physiology, vol. 4: Pla [corr.: Ple] - Wri
Todd, Robert Bentley
776 SPLEEN. 
Tiie Malpighian corpuscles are imbedded in 
the red spleen substance, and, with the ex¬ 
ception of one point, where they are attached 
to arterial twigs, they are everywhere sur¬ 
rounded by this substance. They are con¬ 
ing. 526. 
A small arterial trunk with Malpighian corpuscles, on 
a somewhat larger artery. From the spleen of the 
Pig. Magnified 10 diameters. 
a, the artery ; h, the sheath of the same ; c, Mal¬ 
pighian corpuscles ; d, pencils or tufts of arteries. 
nected to the small arteries and their twigs by 
short peduncles, like the berries of a bunch 
of grapes ; and, in such wise, that a small 
arterial trunk of from 2 to 4-100ths line, with 
its ramifications, supports 5 to 10 corpuscles. 
(Fig. 526.) The peduncles of the corpuscles 
are almost always small arteries, which pass 
to be distributed to them ; but in less frequent 
instances, they are constituted by short pro¬ 
cesses of the arterial sheaths, which are con¬ 
tinuous with the membranous wall of the 
corpuscle. In this manner the majority of the 
Fig. 527. 
A Malpighian corpuscle from the spleen of the Ox in 
connection ipith a small artery, magnified 150 dia¬ 
a, wall of the Malpighian corpuscle ; b, contents of 
the same ; c, coat of the artery ; d, sheath of the 
corpuscles are essentially devoid of a peduncle, 
and sit immediately on the arteries at their 
points of bifurcation, or at then* sides, (Figs. 
527, 258.) This relation, which also obtains 
Fig. 528. 
Malpighian corpuscle from the spleen of the Pig in 
connection with an artery from which a branch 
passes to the corpuscle. Treated with soda, and 
magnified 250 diameters. 
a, wall of the corpuscle ; b, elastic fibres in the same ; 
c, sheath of the artery ; d, dissolved middle tunic 
of the artery ; e, elastic inner coat, 
in animals, formerly appeared to J. Müller as 
indicating the fact that the splenic corpuscles 
were hollow excrescences of the vessel-walls, 
or were imbedded in these latter. But if by 
this be understood, what Muller’s plates and 
description imply, that the sheaths of the 
vessels, in their whole thickness, with all their 
elements, are continued to form the cor¬ 
puscles, then it is certainly incorrect : for in 
some animals I have seen that, from the rich 
network of elastic fibres and muscular struc¬ 
ture of these sheaths, little or nothing passes 
to the corpuscles : and I have generally found 
the membrane of the corpuscle very delicate. 
It is, however, quite conformable to truth, to 
state that this membrane has a direct con¬ 
tinuity with the arterial sheaths. (Fig. 527, 
The corpuscles do not possess any con¬ 
nection with the trabecular network, still less 
that which Gerlach has lately attributed to 
them : viz. that they serve as points of sup¬ 
port to the elastic fibres of the partitions ; a 
belief which is altogether baseless. 
It is difficult to say any thing definite re¬ 
specting the number of the splenic corpuscles. 
Hessling believes that, in some cases, they 
constitute from one-fifth to one-sixth of the 
whole splenic mass ; and this seems to me no 
overstatement, if we substitute the expression 
“ spleen-pulp ” for “ spleen-mass.” At least, 
I have found, that their quantity is very 
considerable; and that in some instances, 
when they are rather turgescent, the whole 
pulp appears as if besprinkled with white. 
They stand so thickly together, that in many 
places they touch each other’s sides ; and in 
others are only separated from each other by 
narrow interspaces, which in the least favour¬ 
able circumstances are about one to two lines 
in size. I believe that the estimate, that one 
and a half to two lines of spleen-pulp con-


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