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The Muscular System-Ch 8.9- 8.10. Producing Movement -Skeletal muscles pull on tendons which pulls on bone -By contracting the muscle pulls one bone toward.

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Presentation on theme: "The Muscular System-Ch 8.9- 8.10. Producing Movement -Skeletal muscles pull on tendons which pulls on bone -By contracting the muscle pulls one bone toward."— Presentation transcript:

1 The Muscular System-Ch 8.9- 8.10

2 Producing Movement -Skeletal muscles pull on tendons which pulls on bone -By contracting the muscle pulls one bone toward another -Origin: the stationary bone that remains in its original position -Insertion: the moveable bone ORIGINS from scapula BELLY of biceps brachii muscle INSERTION on radius ORIGINS from scapula and humerus INSERTION on ulna Tendons Tendon BELLY of triceps brachii muscle

3 Group Actions -Muscles act in groups to produce movements -Opposing pairs -Flexors/Extensors -Abductors/Adductors -Agonist: muscle causing desired action -Antagonist: muscle that is relaxed Agonist Antagonist

4 Aging of Muscular Tissue -Skeletal muscle becomes fibrous and adipose tissue -Mainly due to decreased physical activity -Number of SO Fibers increase -Aerobic and strength training activities can reverse effects

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