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Keywords for muscles and joints. Biceps – muscle that moves lower arm up Triceps – muscle that moves lower arm down Contract – when muscles get shorter and fatter Relax – when muscles get longer and thinner Tendon – attach muscles to bones Ligament – attach bones to bones
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Biceps – muscle that moves lower arm up • Triceps – muscle that moves lower arm down • Contract – when muscles get shorter and fatter • Relax – when muscles get longer and thinner • Tendon – attach muscles to bones • Ligament – attach bones to bones • Cartilage – stops bones rubbing • Synovial fluid – lubricates joints • Antagonistic – work in opposite directions