renders them more practical. In short, anatomy and physiology supply a
necessary basis for the study of hygiene.

*Advantages of Properly Managing the Body.*—One result following the
mismanagement of the body is loss of health. But attending the loss of
health are other results which are equally serious and far-reaching.
Without good health, people fail to accomplish their aims and ambitions in
life; they miss the joy of living; they lose their ability to work and
become burdens on their friends or society. The proper management of the
body means health, and it also means the capacity for work and for
enjoyment. Not only should one seek to preserve his health from day to
day, but he should so manage his body as to use his powers to the best
advantage and prolong as far as possible the period during which he may be
a capable and useful citizen.




CHAPTER II - GENERAL VIEW OF THE BODY


*External Divisions.*—Examined from the outside, the body presents certain
parts, or divisions, familiar to all. The main, or central, portion is
known as the _trunk_, and to this are attached the _head_, the _upper
extremities_, and the _lower extremities_. These in turn present smaller
divisions which are also familiar. The upper part of the trunk is known as
the _thorax_, or chest, and the lower part as the _abdomen_. The portions
of the trunk to which the arms are attached are the _shoulders_, and those
to which the legs are joined are the _hips_, while the central rear
portion between the neck and the hips is the _back_. The fingers, the