Major Muscles of the Human Body ( anterior and posterior view)
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Major Muscles of the Human Body ( anterior and posterior view)







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Major Muscles of the Human Body ( anterior and posterior view). Human Muscular System “anterior view”. quadriceps. biceps . deltoid. abdominals. sternocleidomastoid. pectorals (chest muscle). Human Muscular System “posterior view”. latissimus dorsi. gluteals. gastrocnemius.
Major Muscles of the Human Body ( anterior and posterior view)

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Slide 1

Major Muscles of the Human Body ( anterior and posterior view)

Slide 2

Human Muscular System“anterior view”

quadriceps

biceps

deltoid

abdominals

sternocleidomastoid

pectorals (chest muscle)

Slide 3

Human Muscular System“posterior view”

latissimus dorsi

gluteals

gastrocnemius

Achilles tendon

trapezius

Hamstring (biceps femori)

triceps

Slide 4

Skeletal Muscles

  • Long, thin, and striped (striated)

  • Continuous control (voluntary)

  • Tendons

    • Attached to bone at the periostium

  • multinucleated

Slide 5

Smooth Muscle

  • Fibers are organized

  • Found inside the body

  • Works automatically

    • (can’t control your smooth muscle)

  • Necessary for survival

Slide 6

Cardiac Muscle

  • Only in heart

  • Contain many mitochondria

  • By age 70 heart contracts 2.5 billion times (assume resting heart beat).

  • involuntary

Slide 7

Muscular Disorders

  • Muscle “pull” or “strain”

    • Tearing a muscle fiber(s), followed by bleeding or swelling of muscle

  • Muscle “cramp”

    • Prolonged contraction of muscle, ion imbalance

Slide 8

Cont.

  • Tendonitis

    • Swelling of the tendons due to sharp twist or pull, over use

  • Muscular Dystrophy

    • Inherited disease in which muscle cells break down, gradual weakening of muscles, lose ability to contract

Slide 9

Quadriceps muscle(rectus femoris)

Origin = “pelvis”

- attachment to stationary bone

Note the origin and insertion of this muscle

belly

tendon

Insertion = “femur”

- attachment to moveable bone

Slide 10

Muscle Terms

  • Tendon

    • Long connective tissue cord

  • Actin and myosin

    • Muscle proteins

  • Origin

    • Attachment to stationary part of bone

  • Insertion

    • Attachment to moveable part of bone

  • Flexion

    • Movement that reduces a joint angle

  • Extension

    • A movement that increases a joint angle

Slide 11

Movements of the body

  • Extension Flexion

Slide 12

Muscle Belly to Sarcomere

  • Muscle Belly

    • Bundle of muscle fibers

  • Muscle Fiber (cell)

    • Bundle of myofibrils

  • Myofibril

    • Made up of units called sarcomeres

  • Sarcomere

    • Made up of muscle proteins

      • actin and myosin

Slide 13

Antagonistic muscle pairs(one contracts while the other relaxes)


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