Fundamentals of Anatomy and Physiology

202 Chapter 9

Muscle

Sarcoplasmic

reticulum

Sarcoplasmic

reticulum and

T tubules

forming triad

Sarcomere

I band

Z line

Actin Myosin

Fascia^

Epimysium^

Perimysium

Endomysium

Fascicle^

Muscle fiber or cell

Cut edge of (^)
sarcolemma T tubule (^)
Myofibril
A band H
zone or
band
(^)
®^
M line
Learning^
Cengage^
Myofilaments Cross-bridge Z line^
©^
Figure 9- 1 The anatomy of skeletal muscle at the microscopic, cellular, and molecular
levels.