The Muscular System

1. The Muscular System Bio 111-73

2. Types of Muscle Tissue • Skeletal • Cardiac • Smooth Bio 111-73

3. Muscle Tissue • Muscle tissue shares the following properties: • excitability • contractability • elasticity Bio 111-73

4. Function of Muscular System • Produce movement • Maintain posture and body position • Maintain body temperature Bio 111-73

5. Muscular System • Skeletal muscles are the ORGANS of MS • Each skeletal muscle contains connective tissue and neural tissue Bio 111-73

6. Contraction of Muscle Fiber • Sarcomeres: functional unit of muscle fiber • Overlapping thin & thick filaments (actin & myosin) Bio 111-73

7. Muscular System • Axial Muscles • Appendicular Muscles Bio 111-73

8. Axial Muscles • 60% of skeletal muscles • Associated with axial skeleton • Position head & spinal column, move rib cage Bio 111-73

9. Appendicular Muscles • Stabilize and move appendicular skeleton Bio 111-73

10. Major Muscles • Deltoids • Biceps • Triceps Bio 111-73

11. Major Muscles • Trapezius • Latissimus dorsi • Gluteus Maximus Bio 111-73

12. Major Muscles • Pectoralis • Rectus abdominus • External oblique Bio 111-73

13. Major Muscles Quadriceps group • Hamstring group Bio 111-73

14. Major muscle actions • Abduct • Adduct • Flex • Extend • Rotate • Pronate • Supinate Bio 111-73