True cleanliness
of person involves the scientific treatment of the skin. This is the
most complicated organ of the body, and one through which the health
is affected more than through any other; and no persons can or will
he be so likely to take proper care of it as those by whom its
construction and functions are understood.
[Illustration: Fig. 57.]
Fig. 57 is a very highly magnified portion of the skin. The layer
marked 1 is the outside, very thin skin, called the _cuticle_ or _scarf
skin_. This consists of transparent layers of minute cells, which are
constantly decaying and being renewed, and the white scurf that passes
from the skin to the clothing is a decayed portion of these cells. This
part of the skin has neither nerves nor blood-vessels.
The dark layer, marked 2, 7, 8, is that portion of the true skin which
gives the external color marking diverse races. In the portion of the
dark layer marked 3, 4, is seen a network of nerves which run from two
branches of the nervous trunks coming from the spinal marrow. These
arc nerves of sensation, by which the sense of touch or feeling is
performed.
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