160 
MANUAL OF NATURE STUDY. 
(c) Special adaptation of structure and pro¬ 
perties of muscles to the ends the}’ 
serve; use many illustrations. 
(d) The care of the muscles. Exercise and 
health. Effects of alcohol and nar¬ 
cotics. 
III. The Digestive System . 
(a) Foods, kinds of, and the composition 
and value of each. Necessity for food. 
Alochol and narcotics not foods. The 
value of water in digestion. 
(d) Structure and function of the teeth, stom¬ 
ach, intestines and other organs of di¬ 
gestion. 
(c) Chemical changes in insalivation, chym- 
ification and chylification. 
( d ) The lacteals, structure and function. 
The portal circulation, special features 
and importance; assimilation of food. 
Adaptation of structure and function. 
( e ) Hygiene of the digestive organs. Se¬ 
lection of food, etc. Effects of alcohol 
and narcotics. 
IV. The Circulatory System . 
(a) The blood, its composition and use, prop¬ 
erties of, structure and use of corpus¬ 
cles. Coagulation and its use. 
