1. Muscular System Chapters 10 & 11

2. Did you know? more than 50% of body weight is muscle ~ 650 muscles in the human body (we will memorize 53)

3. Some Muscle Terminology Muscle fibers = muscle cells Myo & sarco: word roots referring to muscle (muscle) (flesh) Three types of muscle tissue: Skeletal, cardiac, & smooth

4. Three Types of Muscle SkeletalCardiacSmooth

5. Functions of Skeletal Muscles Allow skeletal movement Maintain posture Support soft tissues Guard entrances and exits Maintain body temperature

6. Skeletal Muscle Anatomy Skeletal muscle are: surrounded by connective tissue contain nerves contain own arteries and veins arranged in antagonistic pairs (e.g. triceps & biceps) (antagonistic means opposing)

7. How Skeletal Muscles Produce Movements Muscles exert a force on tendons which pull on bones Tendons connect muscle to bone brachialis flexes forearm

8. Origin Insertion Origin: the attachment of the muscle to the bone which remains stationary Insertion: the attachment of the muscle to the bone which moves Belly: between the origin and insertion Terminology

9. Flexion Types of Movement p. 271-274

10. Extension

11. Hyperextension

12. Abduction, Adduction, & Circumduction

13. Rotation

14. Elevation & Depression

15. Protraction & Retraction