the
structure of their coats.

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391. At certain points, the lymphatic vessels pass through distinct,
soft bodies, peculiar to themselves, which are called _lymphatic
glands_, which are to these vessels what the mesenteric glands are to
the lacteals. The lymphatic glands vary in form and in size. They are
extremely vascular, and appear to consist of a collection of minute
vessels. These glands are found in different parts of the body, but
are most numerous in the groins, axilla, or arm-pits, neck, and
cavities of the chest and abdomen.

_Observation._ From exposure to cold, these glands are frequently
enlarged and inflamed. They are known under the name of "kernels."
They are often diseased, particularly in scrofula, or "king's evil."

PHYSIOLOGY OF THE LYMPHATIC VESSELS.

392. Though the lacteals and lymphatics resemble each other in their
structure and termination, yet they differ as to the nature of the
fluids which they convey, as well as the nature of their functions.
The lacteals open into the small intestine, and possess the power of
rejecting all substances in the passing aliment, but the chyle. The
lymphatics, on the contrary, not only imbibe all the various
constituents of the body, both fluid and solid, but they sometimes
absorb foreign and extraneous substances, when presented to their
mouths, as in vaccination.

393. The varieties of absorption are, the _In-ter-sti'tial_,
_Rec-re-men-ti'tial_, _Ex-cre-men-ti'tial_, _Cu-ta'ne-ous_,
_Res-pi'ra-to-ry_, _Ve'nous_, and the _Lac'te-al_.

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391. Describe the lymphatic glands. What observation is given in
regard to these glands? 392-403. _Give the physiology of the lymphatic
vessels._ 392. Explain the difference between the lacteals and
lymphatics 393. Name the varieties of absorption.

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394. INTERSTITIAL absorption is that change which is constantly going
on in the animal economy among the particles of matter of which every
texture is composed. The ordinary functions of the body, in health,
require incessant action of the lymphatics; the circulatory system,
with its myriads of small vessels, is constantly depositing new atoms
of matter, which become vitalized, and perform a course of actions,
then die, or become useless. These old atoms are removed by the
absorbent system. Thus, wherever there is a minute artery to deposit a
living particle of matter, there is a lymphat