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QUESTIONS ON THE SKIN.
Of what use is the skin?--"It covers the muscles of the body."
What can you tell about it?--"It is flexible, elastic, porous, and
absorbent."
Why do you say it is flexible?--"Because it is easily bent."
Why do you say it is porous?--"Because it is full of little holes, or
pores."
Why do you say it is elastic?--"Because it will spring back after it is
stretched, squeezed, twisted, or bent."
Why do you say it is absorbent?--"Because it will soak up liquids."
How many skins have you?--"Two; an outside skin, and an inner skin."
Which is the true skin?--"The inner skin."
Of what is the inner skin composed?--"Of blood-vessels and nerves."
How do you know that the outer skin has no blood-vessels?--"Because if I
put a pin through the outer skin the blood does not flow out, as it would
if I had cut a blood-vessel."
How do you know the outer skin has no nerves?--"Because if I put a pin
through my outer skin it does not make me suffer pain, as it would if I had
touched a nerve."
What gives color to the skin?--"A jelly-like substance between the inner
and the outer skin."
What have you learned about the true skin?--"That it is of the same color
in people of every nation.
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