Do not use your mouth as a box or a pin-cushion; the pin, or whatever yon have put into it, may slip into your throat and cause your death.
QUESTIONS ON THE INTRODUCTORY LESSONS.
Of what is the body built?—"Of bones."
What covers the bones?—"Flesh."
What covers the flesh?—"Skin."
What flows through the body?—"Blood."
Where does the blood flow from?—"The heart."
When does the blood flow from the heart?—"Every time the heart beats."
Show with your hand how the heart beats.