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22 Cards in this Set

  • Front
  • Back

joint (articulation)

when two or more bones come together; connects skeleton and gives mobility

fibrous joints

bones joined by fibrous connective tissue, immovable

sutures of skull

cartilaginous joints

united by cartilage, limited movement. strength, flexibility, shock

pubic symphasis, sternocostal, intevertebral disks

synovial joints

articulating surfaces separated by fluid filled joint cavity, permits most movement

all limb joints

synovial joint: articular cartilage

lines ends of bones, hyaline cartilage

synovial joint: joint (synovial) cavity

free space

synovial joint: joint capsule

connective tissue surrounds bone, contains fluid

synovial joint: synovial fluid


synovial joint: reinforcing ligament

give strength

Ball and socket

hip and shoulder, permits most motion, spherical head articulates with cup like socket


motion along single place, flexion and extension, elbow and interphalangeal joints


rounded end of one bone protrudes into sleeve or ring of another, only uniaxial movement allowed. atlas and dens, radius and ulna

Lever systems

gives mechanical advantage

1st class levers

seesaw; atlantoccipital joint (atlas and occipital bone)

2nd class levers

wheelbarrow; calf raises (metatarsalphalangeal joint)

weight is distributed, gives the best mechanical advantage

3rd class levers

tweezers/tennis racket; bicep curl

most in body are this class, gives us more control

shoulder joint

glenoid cavity of scapula and head of humerus

ball and socket joint

not very strong or deep, stable

joint stability maintained by rotator cuffs

Knee joint

relies on ligaments for strength


injury to ligament


muscle pull


inflammation of bone joint, ends of bone wear away

rheumatoid arthritis

inflammatory autoimmune disease where inflammatory chemicals are released. body attacks joints, erosion of cartilage, thickening of joint surfaces