1. Structure and Function of Skeletal Muscle

2. Three classes of muscle
Skeletal muscle-responsible for locomotion
Cardiac muscle-responsible for the action of the heart
Smooth muscle-responsible for the contraction of irregular shaped organs such as the intestines.

3. Skeletal Muscle Mammal body contains over 400 skeletal muscles
Approx % of total body weight

4. Skeletal Muscle Functions of skeletal muscle
Force production for locomotion and breathing
Force production for postural support
Heat production during cold stress
Saleable product in livestock producion

5. Skeletal Muscle Muscles generally work in pairs to produce movement
One muscle flexes(or contracts) the other relaxes

6. Structure of Skeletal Muscle: Connective Tissue Covering
Epimysium
Surrounds entire muscle
Perimysium
Surrounds bundles of muscle fibers
Endomysium
Surrounds individual muscle fibers

8. Structure of Skeletal Muscle: Microstructure
Sarcolemma
Muscle cell membrane
Myofibrils
Threadlike strands within muscle fibers
Actin (thin filament)
Myosin (thick filament)