Page 6 - 8.5 MUSCLES

OL
OL
UNT

2. INVOLUNTARY MUSCLES
2. I NV OL UNT A R Y M US C LE S
2.
UNT
2.
M
I
M
NV
NV
A
A
Y
I
Y
R
LE
LE
S
R
S
C
US
US
C
mu
h
l
h
w
o
e
s
e
c
s

T
e
• •The muscles whose

s

u
o
i
me
u
u
o
t
r
r
n
r
t
t
o

t
s

r
r
v
d
o
o
d
r
u

e
e
u
d
e

n
n
n
movement is not under our
u
mo
e
n
n
o
n
c o n t r o l a r e k n o w n a s
control are known as
v
i
y
involuntary muscles.
n
s
r
s
l
t
mu
u
e
n
l
.
a

o
c

t

,
t
t
mu
mu
mu

s
c
c
c
s
s
h
h
h
e
e
e
e
l
l
l
e
e
,
a
a
r
a

r

mp
mp
n
n
r

n

e
i
F
e

e

x
x
F
x
i
i
F
mp
e
• •For example, the muscles in
e
l
s
e
o
o
,
s
s
o
l

l
t h e w a l l s o f t h e s t o ma c h ,
the walls of the stomach,
f
f
t
e

f

s
u
u

c
u
c
c
n
o
o
intestine and lungs function
t
t
i
o
i
i

i
u
d
l
a
n
g
n
i
s
n
t
n
n
n
n
n
n
e
t

l
l
e
e
c
c
l
c
s
s

s
s
e
s
s

o

r
i
i
r
r
n
n
.
n
w
o
o
w
w

t

n
o o o
on their own. These muscles
n
n
e
e
i
e
h
t
t
h
h
.
s
e
s
s
e
h
h
e
h
mu

mu
mu

e
e

e
T

T

.
T

a r e t h e r e f o r e i n v o l u n t a r y i n
i
i
are therefore involuntary in
n
n
n a t u r e .
nature.
l
n
h
s

a

T
• •They are also known as
r
n
a

y
o
o
s
w
k

a
e
e
smooth muscles.
s mo o t h mu s c l e s .