8. Most of the nerve branches pass out through a large opening at the
back of the skull, in one large bundle called the spinal cord.

9. The spinal cord runs down through a canal in the backbone, and all
along gives off branches to the various parts of the body.

10. It gives us pain to prick or hurt the flesh in any way, because when
we do so we injure some of the little nerve branches of the brain cells.

11. When we suffer, we really feel a pain in the brain. We know this
because if a nerve is cut in two, we may hurt the part to which it goes
without giving any pain.

12. We have different kinds of nerves of feeling.

13. There are other nerves besides those of feeling. These are nerves of
work.

14. The nerves of work have charge of the heart, the lungs, the muscles,
the liver, the stomach, and every part of the body which can work or
act.

15. The brain and nerves control the body and make all the different
parts work together in harmony, just as a general controls an army.

16. The brain uses the nerves very much as a man uses the telephone or
telegraph wires.

17. With the large brain we remember, think, and reason.