Page 13 - 8.4 JOINTS
P. 13
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GLI
GLI
I
I
:
NG JOI
D
D
NT
NT
NG JOI
4.
4. GLI D I NG JOI NT :
4.
4. GLIDING JOINT:
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g
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G
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• •Gliding joints are also known as a
s
s
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s
a
s
t
t
l
o
l
l
l
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.
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T
T
T
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j
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a
mi
n
e
w
l
e
e
mi
e
mi
s
s
s
r
r
r
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t
plane joint. This joint permits two
t
t
t
p
p
w
p
p
w
o
o
o
t
o
mo
d
r
n
or more round or flat bones to
o
o
u
r
b
e
o
r
f
a
n
r
l
e
o
s
t
n
w
o
o
w
y
t
r
r
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e
y
e
n
t
t
o
h
t
u
e
u
t
o
e
h
a
a
i
h
i
t
h
t
g
g
y
r
e
y
r
f
f
e
v
v
e
l
e
e
l
e
move freely together without any
mo
mo v e f r e e l y t o g e t h e r w i t h o u t a n y
mo
r
f
r
b
rubbing or crushing of bones.
o
o
i
s
g
b
o
n
h
n
.
e
i
u
c
u
n
r
s
g
b
l
s
i
j
u
d
i
t
n
n
• • This joint is mainly found in
o
i
h
f
s
y
T
n
o
ma
n
i
i
t h o s e r e g i o n s w h e r e t h e t w o
those regions where the two
s
n
s
e
e
s
a
e
s
g
me
a
e
g
s
i
i
i
n
l
l
d
a
me
i
a
d
o
d
d
o
n
o
o
e
e
t
n
n
n
b b b o n e s me e t a n d s l i d e a g a i n s t o n e
bones meet and slide against one
a
t
n
n
t
a
e
e
t
s
a
a
y
y
r
i
r
i
e
e
h
n
s
s
e
e
n
f
n
o
o
d
d
e
f
e
i
n
n
i
a a a n o t h e r i n a n y o f t h e d i r e c t i o n s .
i
another in any of the directions.
i
h
t
t
h
c
o
o
n
n
c
t
t
h
t
o
o
r
r
t
n
c
y
o
a
a
t
t
o
y
n
e
e
k
n
b
e
b
h
h
e
d
They also allow the back to bend
c
T T T h e y a l s o a l l o w t h e b a c k t o b e n d
k
d
l
b
l
l
t
t
l
b
o
h
h
o
e
e
o
s
s
o
a
a
a
l
w
a
l
w
t
s
i
t
w
d
.
n
and twist.
a
r
t
l
r
t
T
• • The lower leg to the ankle joint
e
e
r
e
i
i
i
o
e
t
t
e
e
n
g
o
t
o
o
o
g
o
t
n
j
h
n
j
j
g
l
h
l
k
h
h
o
w
l
k
k
l
e
n
e
n
n
e
e
e
o
o
e
t
t
l
t
w
e
l
a
a
l
l
a
w
a
a
d
t
a
i
r
s
m
e
h
n
r
r
j
t
i
e
t
n
w
e
e
o
e
and the forearm to wrist joint are
a
o
f
r
r
r
o
t
a
g
e
g
i
n
n
h
n
e
g
n
n
n
t t t
h
i
i
the two main examples of gliding
e
h
i
f
t
f
f
o
o
t
w
t
mp
mp
o
e
e
o
o
s
s
e
s
l
w
o
w
l
l
i
i
d
d
a
l
i
a
d
e
e
i
i
x
x
e
x
ma
ma
ma
g
mp
g
g
a
l
l
i
s
.
t
n
j
o
joints.
