1. 7-3.3 SUMMARIZE THE RELATIONSHIPS OF THE MAJOR BODY SYSTEMS MUSCULAR SYSTEM- WORKS WITH THE SKELETAL SYSTEM TO ALLOW MOVEMENT. Muscular System Notes

2. Functions of the Muscular System The Primary Function of the Muscular System is Movement. Every movement in your body---from the beating of your heart, to the movement of food down your throat---occurs because of your muscles.

3. Muscle Movement Voluntary- you can consciously control them (like the muscles in your arms). Involuntary- you cannot consciously control them (like the muscles in your intestines).

4. Skeletal Muscles Attached to your skeleton with Tendons Functions:  Perform Voluntary Movement  Walking and Flexing Description:  Long, striated (striped) fibers  Fibers work in pairs by contracting  Get tired easily

5. Smooth Muscle Found inside organs. Functions  automatically control many types of movement (Ex. Pushing food down digestive system) Description:  Involuntary  Shorter than Skeletal Muscles  Found in walls of stomach, blood vessels, and intestines  Contract Slowly  Do not get tired easily

6. Cardiac Muscles Found in the heart. Functions:  Pump blood through blood vessels by making heart beat. Description:  Involuntary  Striated  Branched Shape  Contract Slowly  Do not get tired

7. Comparison of Muscle Types

8. Tendons Tendons are strong tissues that attach muscle to bones. How They Work:  As muscle fibers contract, they shorten and pull the tendon.  In turn, the tendon pulls the bone and makes it move.