Joints of the Skeleton

joint

where two or more bones meet

arth

latin word that means joint

joints

allows us to move

joints

holds our skeleton together

3

how many types of joints are there?

anatomical name

based upon what separates the bones

physiological name

based upon how well the joint moves

synovial joints

most movable type of joint

synovial fluid

what is the space between two synovial joints filled with

diarthrosis

synovial joints are also known

fibrous joint

least movable type of joint

fibrous joint

immovable joint

fibrous ct

fibrous joint bones are separated by

synarthrosis

fibrous joints are also known as

cartilaginous joint

the middle most movable type of joint

cartilage

the space between the bones of cartilaginous joints are filled with

amphiarthrosis

cartilaginous joints are also known as

hinge

the most common type of joint

hinge

allows 1 type of movement

hinge

allows a joint to only bend and straighten

pivot

allows only 180 degree rotation

pivot

one bone rotates around another

saddle

allows 2 types of movement

saddle

allows a joint to bend and straighten

saddle

allows a joint to move side-to-side

plane

bones slide against each other like blocks gliding against each other

plane

common in short bones

ball and socket

allows many different types of movement

ball and socket

most movable type of joint

condyloid

allows 2 types of movement

condyloid

allows a joint to bend and straighten

condyloid

allows a joint to slightly shift side-to-side

condyloid

a modified ball and socket

flexion

decreasing an angle between 2 bones

extension

increasing an angle between 2 bones

hyperextension

extending beyond a straight line

dorsiflexion

toes/foot point upwards

plantarflexion

toes/foot point downwards

abduction

pulling limbs away from midline

adduction

bringing limbs back to midline

circumduction

rotation

180 degree rotation

lateral rotation

rotating out to the side

medial rotation

rotating in toward the midline

supination

palm rotates up

pronation

palm rotates down

eversion

elevating your lateral soles (big toe side down)

inversion

elevating your medial soles (pinkie toe side down)

protraction

to stick out

retraction

to pull back in

elevation

to raise up

depression

to lower