How do tea and coffee impair digestion? Why is it harmful to use iced
foods and drinks? Why should we not eat pepper and other hot and
irritating things? How should the teeth be cared for? How does
tobacco-using affect the stomach? What dreadful disease is sometimes
caused by tobacco? How does alcohol affect the gastric juice? the
stomach? the liver?

CHAPTER X. A DROP OF BLOOD.--What does the blood contain? How
many kinds of blood corpuscles are there? What work is done for the body
by each kind of corpuscles?

CHAPTER XI. WHY THE HEART BEATS.--Where is the heart? Why does
the heart beat? How many chambers has the heart? What are the
blood-vessels? How many kinds of blood-vessels are there? Name them.
What is the difference between venous blood and arterial blood? What
change occurs in the blood in the lungs? What is the pulse? How much
work does the heart do every twenty-four hours? What are the lymphatics?
What do they contain, and what is their purpose? What are lymphatic
glands?

CHAPTER XII. HOW TO KEEP THE HEART AND BLOOD HEALTHY.--Name
some things likely to injure the heart or the blood. What is the effect
of violent exercise? of bad air? of bad food? of loss of sleep? of
violent anger? What can you say about clothing? What is the effect of
alcohol upon the blood? the heart? the bodily heat? What is the effect
of tobacco upon the heart? the pulse? the blood? What is the effect of
tea and coffee upon the heart? What is a cold? In a case of bleeding
from a wound, how can you tell whether a vein or an artery is cut? How
would you stop the bleeding from an artery? from a vein? How would you
stop nose-bleed?