1. INTRODUCTION TO MUSCLES

2. Functions  Movement  Stabilization of Joints  Posture  Thermogenesis

3. Three Types

4. Cardiac Muscle

5. Smooth Muscle

6. Skeletal Muscle

7. Cardiac Muscle  Found only in heart  Involuntary  Branching, striated  Intercalated discs – special cell junctions that allow heart muscles to coordinate contractions

8. Smooth Muscle  Mainly in walls of hollow organs  Involuntary  Nonstriated  Peristalsis – wavelike motion of contraction

9. Skeletal Muscle  Voluntary – only type that makes up the “muscular system”  Found in skeletal muscles attached by tendons to bone  Striated, multinucleate

10. Connective Tissue Wrappings  Endomysium – wraps each muscle fiber  Perimysium – wraps bundles of fibers called fascicles  Epimysium – surrounds whole muscle

11. What can you identify?