1. Muscles

2. Functions of the muscular system

3. Functions of the muscular system
Stabilize joints with their TENDONS
Produce movement (including standing upright)
Produce heat to maintain body temperature

4. MUSCLE FACTS There are more than 600 muscles in your body
Muscles are made of fibers that run parallel to each other held together in bundles by connective tissue
Each fiber is a cylinder shaped cell

5. Types of muscle tissue

6. SKELETAL MUSCLE Attaches to bone for movement Striated: banded
Voluntary: you control them
Can fatigue (tire out)

8. CARDIAC MUSCLE Found only in the heart Make your heart beat Striated
Involuntary: you can’t control it
Does not fatigue (tire out)

10. SMOOTH MUSCLE Unstriated Involuntary React slowly and tires slowly
Controls breathing, digestive movements, and blood pressure

12. MUSCLE ACTION Muscles always work in pairs
While one contracts, the other is relaxed
Muscle fibers all have the same strength, so why are some people stronger than others?
They have more muscle fibers