"
How does drinking alcoholic liquors hurt the muscles?--"It makes them weak,
and unfit to move the parts of the body."
What wonderful muscle moves without your will?--"The heart."
How does alcohol hurt the heart?--"It makes it beat too fast."
How does "beating too fast" hurt the heart?--"It makes it tired, and
sometimes wears it out." See Appendices on Alcohol and Tobacco.
* * * * *
[Illustration: THE SKIN (very highly magnified).--(From Walker's
_Physiology_, 1884.)]
A, arteries; V, veins; N, nerves; F, fat cells; E, the outer skin; CL, the
color layer; D, the true skin; PT, a perspiratory tube; HF, a hair and hair
sac; EP, muscles; SG, oil glands; TC, tactile corpuscles; CT, connective
tissue.
* * * * *
PART VII.
FORMULA FOR THE LESSON ON THE SKIN.
1. My skin covers my body.
2. It is thin, elastic, flexible, porous, and absorbent.
3. I have two skins; the inner skin is the true skin.
4. My true skin is elastic, and like a net-work of blood-vessels and
nerves. My true skin is covered with a jelly-like substance which gives
color to my skin.
5. My outside skin is not the same thickness over my whole body.
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