2. Muscles Chapter 10

3. Fasicle arrangement

4. Physics of levers

5. Torque Torque = Force x Lever length or   l

6. A human example

7. There are 3 types of lever systems 1.First Class - fulcrum between load and effort 2.Second Class - load is between fulcrum and effort 3.Third Class - effort is between load and fulcrum

8. First Class Lever Systems The classic “see-saw” or teeter totter of your youth

9. Second Class Lever Systems

10. Third Class Lever Systems Most muscle/joint systems fall into this catagory

11. Muscles: anterior

12. Muscles: posterior

13. Muscles of the Hip & Thigh (anterior view)

14. The Adductor brevis

15. The Gluteus minimus

16. The erector spinae Erector spinae

17. Up next … Nervous System Histology