10 
INTRODUCTION. 
Physiology been gradually recognised. We cannot omit mention- 
ing the names of KRAUSE, VALENTIN, SCHWANN, HENLE in pre- 
ference to many others whom we could willingly refer to in this 
field of enquiry’. We must limit ourselves to a short survey, 
~and will rather enumerate than describe the different Tissues. A 
complete description, however compressed, would demand more 
space than is consistent with the nature of this manual. 
Is 
IL. 
LI. 
Conjunctive Tissue (tela conjunctiva), ordinarily Cellular 
Membrane or Areolar Tissue, called also by others Formative 
Tissue, occupies almost everywhere the space between the 
different parts, and forms, according to Cuvier’s well-selected 
comparison, a kind of sponge, which has the same shape as 
the whole body which it contributes to form. By long 
boiling it is dissolved into glue. It consists of bundles of 
threads, and has no resemblance to the cellular tissue of 
plants which consists of hexagonal cells. The threads are 
long, have a somewhat tortuous course and an extreme 
tenuity (about 5 millim.)?. 
Adipose Tissue (tela adiposa). Formerly this constituent 
was not distinguished from the former; it was considered 
to be cellular tissue containing fat. But it is quite neces- 
sary to distinguish between them. ‘This tissue consists of 
vesicles or cells, which, compared with other elementary 
parts of the animal body, are pretty large (about 5 ...; mil- 
lim.). Fat is, with the exception of some constituents of 
milk in the class mammalia, the only non-azotized substance 
of the animal body and, like most vegetable constituents, 
rich in Carbon. Fat, except in situations where it occurs 
as a distinct membrane, forms in the combined state a con- 
stituent of different tissues and of many animal fluids. 
Vascular Tissue (tela vascularis). Vessels are hollow cylin- 
ders, which contain nutrient fluids that circulate through 
the body. To these belong the Lymphatics as well as the 
blood-vessels. The larger blood-vessels are composed of 
1 Here too it may suffice to refer to a single work of eminence. J. HEenux, Alge- 
meine Anatomie, Lehre von der Mischung’s-und Formbestandtheilen des menschlichen 
Korpers. 
Leipzig, 1841. 8vo. 
[? A millimeter is about half an English line, or the 24th part of an inch. ] 
