CHAPTER XXXII 
MOVEMENT 
In the introduction to biology and man, we have seen how 
man came to live in all parts of the world in well made houses 
to protect him from the cold and rain. In this respect he is 
superior although similar to all other animals. As we studied 
his use of food, there was 
seen also to be a funda¬ 
mental similarity between 
man and animals. Now 
as we take up the next life 
process of movement the 
same relationship will ap¬ 
pear. 
We usually think of man 
as walking or running, and 
it is only when we witness 
an acrobatic performance 
that the wide range of 
movements possible in man 
is realized. That man can 
do so many more things 
with his body than any 
other animal is due to the 
greater development of his nervous system. The structures 
by means of which he moves and which are described in 
this chapter are the muscles and the skeleton. 
340. Skeleton and Muscles. — Muscles which serve to 
move the body cover and protect the skeleton of man. The 
432 
Figure 380. — Skeleton. 
