Muscular+System

MUSCULAR SYSTEM The muscular system includes the muscles of the body.


 * Types of muscles:**

1. __SKELETAL__: muscles that attach to the bones of the body with tendons. These muscles move our bones. They are voluntary (under our control) and get tired quickly.

2. __SMOOTH__: muscles that make up the stomach, intestines and arteries. These muscles are involuntary (out of our control) and move slowly.

3. __CARDIAC__: muscles that make up the heart. These muscles are involuntary (out of our control) and never get tired.

Skeletal muscles work in pairs. When one muscle contracts or squeezes, the other muscle relaxes. Muscles only pull bones, they never push bones.
 * HOW MUSCLES WORK:**