Keywords for Keywords for musclesmuscles and and jointsjoints

ulna

radius

humerus

biceps triceps

BicepsBiceps – muscle that moves lower arm up – muscle that moves lower arm up TricepsTriceps – muscle that moves lower arm – muscle that moves lower arm

downdown ContractContract – when muscles get shorter and – when muscles get shorter and

fatterfatter RelaxRelax – when muscles get longer and – when muscles get longer and

thinnerthinner TendonTendon – attach muscles to bones – attach muscles to bones LigamentLigament – attach bones to bones – attach bones to bones CartilageCartilage – stops bones rubbing – stops bones rubbing Synovial fluidSynovial fluid – lubricates joints – lubricates joints AntagonisticAntagonistic – work in opposite – work in opposite

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