1. The Muscular System

2. Gross Anatomy of Skeletal Muscle
bundle of muscle fibers
muscle fiber
(cell)
myofibril
sarcomere

3. Connective Tissue Sheaths
Endomysium
Perimysium
Epimysium
Collagen fibers of all 3 layers come together at each end of muscle to form a tendon or aponeurosis.

4. Basic Features
Nerve & blood supply
Attachments
Origin
Insertion

5. Muscle Fiber Anatomy Sarcolemma Sarcoplasm Myoglobin
Transverse tubules (T-tubules)
Myofibrils
Myofilaments
Two types
Actin filaments (thin filaments)
Myosin filaments (thick filaments)

6. Myofibril

7. A band
Sarcomere

8. Sarcomere
I bands

9. Z lines
Sarcomere

10. Actin and Myosin Filaments

11. Myosin (Thick) Filament

12. Actin (Thin) Filament

13. axon
myofibrils
sarcomere
plasma membrane

14. T tubules
sarcoplasmic reticulum