2. The blood when pure is of a bright red color; it is a liquid made from
food and drink.

3. It passes from my heart to all parts of my body, through pipes called
arteries; these arteries spread out through the body like branches from a
tree.

4. As the blood flows from the heart, through the arteries, it gives
nourishment to every part of the body, and carries away the impurities it
meets, which makes it black and thick; when it comes through the veins,
back to the heart, it is not fit to be used, so it goes to the lungs to be
purified by the fresh air; then it returns to the heart to be sent again
throughout the body; this happens once in from three to eight minutes, and
is called the circulation of the blood.

7. If I would be healthy,
my blood must be pure and circulate freely all the time.

8. It will not circulate freely,
if I wear tight clothing,
if I do not exercise in work or play,
if I do not keep my body warm.

9. It will be impure,
if I breathe bad air,
if I eat unwholesome food,
if I drink alcoholic liquors,
if I snuff, smoke, or chew tobacco.

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