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The Muscular System. Chapter 10. The Muscular System. Structure/function of muscles. Organization of Muscles. 600 Human skeletal muscles General structural and functional topics _____________________________ connective tissues of muscle coordinated actions of muscle groups

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The muscular system l.jpg

The Muscular System

Chapter 10


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The Muscular System

  • Structure/function of muscles


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Organization of Muscles

  • 600 Human skeletal muscles

  • General structural and functional topics

    • _____________________________

    • connective tissues of muscle

    • coordinated actions of muscle groups

    • _____________________________


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The Functions of Muscles

  • Movement of body parts and organ contents

  • ____________________________________

  • ___________________ - speech, expression and writing

  • Control of openings and passageways

  • ____________________


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Connective Tissues of a Muscle

  • Terms:

    • _______________

    • _______________

    • Endomysium

    • Fasicle

    • ______________

    • ______________

    • Deep fascia


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Location of Fascia

  • Deep fascia

    • ____________________________

  • ______________________________

    • adipose between skin and muscles


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Parts of a Skeletal Muscle

  • ______________

    • attachment to stationary end of muscle

  • Belly

    • _______________ _______________

  • _______________

    • attachment to mobile end of muscle


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Skeletal Muscle Shapes

  • _____________________________ (biceps brachii m.)

    • thick in middle and tapered at ends

  • Parallel muscles have parallel fascicles

    • rectus abdominis m.

  • Convergent muscle

    • broad at origin and tapering to a narrower insertion

  • ________________ muscles (rectus femoris and deltoid)

    • fascicles insert obliquely on a tendon

    • _________________________________________________

  • ________________ (orbicularis oculi)

    • ring around body opening


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Muscle Actions

  • Prime mover or agonist

    • __________________________

  • ______________________ aids the prime mover

    • stabilizes the nearby joint

    • modifies the direction of movement

  • Antagonist

    • ___________________________

    • preventing excessive movement and injury

  • _________________________

    • prevents movement of bone


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Muscle Actions during Elbow Flexion

  • Prime mover (agonist) = brachialis

  • Synergist = biceps brachii

  • Antagonist = triceps brachii

  • Fixator = muscle that holds scapula firmly in place

    • rhomboideus m.


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Bipennate parallel circular

convergent multipennate

fusiform unipennate


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  • fiber circular

  • Fibril

  • perimysium

  • Fasicle

  • endomysium

  • Epimysium

  • Deep fascia


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Intrinsic and Extrinsic Muscles circular

  • ___________ are contained within a region such as the hand.

  • ______________ move the fingers but are found outside the region.


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Skeletal Muscle Innervation circular

  • _____________ arising from the brain

    • exit the skull through foramina

    • numbered I to XII

  • ____________________ arising from the spinal cord

    • exit the vertebral column through intervertebral foramina


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How Muscles are Named circular

  • English names for muscles are modifications of the Latin names.

  • Table 10.1 = terms used to name muscles

    • _______________ = elevates a body part

    • profundus = deepest

    • _____________________ = having 4 heads


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Athletic Injuries circular

  • Vulnerable to sudden and intense stress

  • Proper conditioning and warm-up needed

  • Common injuries

    • _____________________

    • pulled hamstrings

    • _____________________

  • Treat with rest, ice, compression and elevation

  • “No pain, no gain” is a dangerous misconception


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