1. MUSCLES

2. MUSCLES 1. There are over 600 muscles in the body.
2. All muscles contract (shorten) only
3. There are 3 kinds of muscles

3. Three Kinds of Muscle

4. SKELETAL MUSCLES 1. Connects to bones… causes them to move
2. Also called banded or striated muscle
3. Also called voluntary muscles .. You make them move
4. These muscles react quickly and tire quickly

5. Movement
When your muscle contracts (shortens) it pulls on the tendon, which pulls on your bone and they move together

6. Tendon vs. Ligament

7. The biceps are the flexor
The triceps are the extensor

8. SMOOTH MUSCLE 1. Does not have bands
2. They contract without you thinking about it
3. Also called involuntary muscle
4. Controls breathing, blood pressure and digestion
5. Reacts slowly and tires slowly

9. CARDIAC MUSCLE 1. Only found in the heart 2. Muscle fibers form mesh
3. Do not tire out

10. Voluntary vs. Involuntary
Under your control
Skeletal Muscle
Ex: bicep
Not under your control
Smooth & cardiac
Ex: stomach muscles
Some muscles can be both, like your eye muscles

11. Summary types of muscles
Description
Found
Voluntary or involuntary
Skeletal muscle
Moves bones
Arms, legs
voluntary
Cardiac
Never gets tired
Heart
Involuntary
Smooth
Organs
Intestine, stomach

12. Exercise Resistance Exercise Strengthen skeletal muscles
Work against the resistance, or weight, of an object
Example: Curl-ups

13. Exercise Aerobic Exercise Steady, moderately intense activity
Increase muscle strength (mostly the heart)
Increases endurance
Example: Swimming

14. Muscle Injury Types of injuries
Strain: muscle or tendon is overstretched or torn
Tendinitis: inflamed tendon due to strenuous exercise
Anabolic Steroids
Can cause long-term health problems
Heart, liver and kidneys
High blood pressure
Before maturity, can stunt bone growth