SUMMARY.
1. The flesh, or lean meat, is composed of muscles.
2. There are five hundred muscles in the body.
3. Muscles are composed of many small threads called muscular fibres.
4. Many of the muscles are joined to the bones by strong white cords called tendons.
5. Muscular fibres can contract so as to lessen their length. It is in this way that the muscles perform their work.
6. All bodily motions are due to the action of the muscles.
7. Most of the muscles act only when we wish them to do so. Some muscles, however, act when it is necessary for them to do so, whether we will that they should act or not, and when we are asleep as well as when we are awake.