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ball and socket
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ball shaped end of one bone fits into cup-shaped socket of another permits widest range of movement in all planes, including rotation ex. sholulder,hip
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terms list
ball and socket
ball shaped end of one bone fits into cup-shaped socket of another permits widest range of movement in all planes, including rotation ex. sholulder,hip
condyloid
oval-shaped condyle fits into elliptical cavity of another angular motion but not rotation occipital condyles with atlas; metacarpals and metatarsals with phalanges
saddle
articulating surfaces of both bones have concave and convex regions; shapes of two bones complement each other permits wide range of movement carpometacarpal joint of thumb is only saddle joint in body
pivot
rounded or conical surface of one bone fits into ring of bone or tendon rotation joint between atlas and axis; proximal radioulnar joint
hinge
convex protection of one bone fits into concave depression in another permits flexion and extension only elbow and knee joints
gliding
flat or slightly curved surfaces moving against each other sliding on twisting without circular movement between carpals in wrist and between tarsals in ankle
articulation
or joint is where two bones come together
synarthroses
are moveable joints, singular form is synarthrosis
amphiarthroses
slightly moveable joints, singular form amphiarthrosis
diarthroses
freely moveable joints, singular form diarthrosis
functions of the skeletal system
support, protection, movement
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