slimy substance and a fluid. The slimy substance prevents the stomach from
being irritated by the food. The fluid dissolves the food.

7. Food passes through several changes after it enters the mouth.

8. It is changed into pulp in the _mouth_, by the action of the teeth and
the saliva. This is called _mastication_. It is changed in the _stomach_,
by the action of the stomach and the gastric juice, into another kind of
pulp called _chyme_. The chyme is changed by the bile and another kind of
juice, called _pancreatic_ _juice_; these separate the nourishing from the
waste substance. The nourishing, milk-like substance is called _chyle_. The
waste substance passes from the body. The chyle is poured into a vein
behind the collar bone, and passes through the heart to the lungs, where it
is changed into blood.

9. If I would have a healthy stomach,
I must be careful what kind of food I eat,
I must be careful how much I eat,
I must be careful how I eat,
I must be careful when I eat.

10. I must eat wholesome food, good bread, ripe fruits, rather than rich
pies or jellies.

11. I must eat enough food, but not too much.

12. I must eat slowly,
I must masticate my food thoroughly,
I must masticate and swallow ray food without drinking