CONTRACTION
MUSCLEFIBER
SARCOPLASM
MYOFIBRIL
SARCOMERE
FASCICLE
PROTEINS
MYOCYTE
BUNDLES
SPINDLE
SLIDING
STRIPED
MUSCLE
MYOSIN
ACTIN
E
A
J
P
U
H
I
P
I
F
F
D
M
X
B
B
B
F
U
U
M
Q
M
U
S
C
L
E
A
I
X
W
Y
W
D
I
I
J
E
E
O
U
U
O
M
U
X
Y
G
O
E
E
O
T
U
T
Z
L
V
F
X
J
E
W
S
I
G
S
U
N
T
S
C
T
I
U
S
A
R
C
O
M
E
R
E
L
I
R
B
I
F
O
Y
M
T
H
A
G
O
I
P
K
E
R
E
I
U
Q
U
J
U
N
T
I
I
S
V
E
X
E
G
L
R
D
E
P
I
R
T
S
E
A
E
U
A
A
V
J
N
L
U
O
A
F
P
L
K
M
S
F
Y
B
A
O
V
I
I
R
O
A
A
F
J
D
A
S
N
X
A
E
H
Y
M
E
D
C
E
M
I
S
Q
A
E
A
F
W
P
S
Y
I
S
I
I
E
Q
B
F
G
T
F
S
L
I
K
A
P
C
M
U
T
L
C
M
J
I
L
X
K
C
P
E
O
O
R
V
I
O
B
S
P
C
Y
X
F
N
Y
A
O
A
R
L
O
N
I
C
E
H
R
W
U
O
U
E
A
X
C
L
U
R
T
D
T
I
L
L
N
U
G
A
S
Z
L
A
R
K
U
I
E
T
M
N
U
E
D
K
E
N
N
I
T
C
A
S
E
I
I
C
C
N
O
U
C
N
L
B
A
V
N
T
S
F
W
A
N
U
K
A
F
O
U
B
I
R
U
X
O
I
D
U
I
Z
S
Q
T
L
B
Y
T
C
E
P
D
Q
G
N
A
E
M
U
D
O
Y
U
U
M
R
Z
C
R
S
A
