the muscular system
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THE MUSCULAR SYSTEM

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THE MUSCULAR SYSTEM. THE MUSCLAR SYSTEM. FUNCTIONS: Body Movement Pump Blood Throughout body Move food through digestive system Control air movement in and out of the lungs. MUSCULAR SYSTEM. CONTRACTION. CONTRACTION : Shortening of a muscle. EXTENSION : stretching of a muscle .

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the musclar system
THE MUSCLAR SYSTEM
  • FUNCTIONS:
    • Body Movement
    • Pump Blood Throughout body
    • Move food through digestive system
    • Control air movement in and out of the lungs
contraction
CONTRACTION
  • CONTRACTION: Shortening of a muscle.
  • EXTENSION: stretching of a muscle.
antagonistic
ANTAGONISTIC
  • Muscles work in opposition, while one contracts, the other extends.
  • Antagonistic = work in opposition, muscles do this, so one muscle would be the antagonistic muscle to another one.
  • Examples = bicep/triceps quadriceps/hamstrings
types of muscles
TYPES of MUSCLES
  • SMOOTH MUSCLE: control movements of internal organs.
    • Involuntary movements…work without conscious control.
    • Intestines, bronchi of the lungs, the bladder.
types of muscles1
TYPES of MUSCLES…
  • SKELETAL MUSCLE: striped or striated muscles attached to the bones that cause body movement.
    • Biceps, triceps.
    • Largest part of the body’s muscular system.
    • Voluntary movements, conscious control.
    • FLEXORS: muscles that close a joint.
    • EXTENSORS: muscles that open a joint.
types of muscles2
TYPES of MUSCLES…
  • CARDIAC MUSCLE: striated tissue that forms the wall of the heart.
    • Involuntary muscle.
    • Heart contracts rhythmically about 100,000 times a day.
care of the muscle system
CARE of the MUSCLE SYSTEM
  • ATROPHY: waste away (“Use it or lose it”)
  • MUSCLE TONE: the natural tension in the fibers of a muscle.
    • Aerobic exercise, resistance training, balanced diet.
    • Older adults…prevent loss of mobility, balance, and risk of falls.
    • The heart is a muscle that needs “training”…regular exercise.
    • Stretching, warm-up, cool down.
    • As always safety.
problems of the muscular system
PROBLEMS of the MUSCULAR SYSTEM
  • MUSCLE SORENESS:

damage to the muscle fibers themselves. Muscle biopsies taken on the day after hard exercise show bleeding and disruption of the z-band filaments that hold muscle fibers together as they slide over each other during a contraction.

problems of the muscular system1
PROBLEMS of the MUSCULAR SYSTEM
  • MYASTHENIA GRAVIS: muscles become weak and easily fatigued.
    • Eye muscles…drooping eyelids and double vision.
  • MUSCULAR DYSTROPHY: inherited disorder characterized by a progressive wasting away of skeletal muscles.
    • No cure.
problems of the muscular system2
PROBLEMS of the MUSCULAR SYSTEM
  • MUSCLE STRAIN:
  • “pulled muscle”, tearing or stretching of muscles fibers as a result of suddenly pulling them to far.
problems of the muscular system3
PROBLEMS of the MUSCULAR SYSTEM
  • BRUISE: discolored area under the skin caused by a leakage of blood after an injury.

After Femur fracture

problems of the muscular system4
PROBLEMS of the MUSCULAR SYSTEM
  • TENDINITIS: the inflammation of a tendon, usually caused by overuse.
problems of the muscular system5
PROBLEMS of the MUSCULAR SYSTEM
  • HERNIA: the protrusion of an organ of tissue through a weak area in the muscle.
additional information
Additional Information
  • Cartilage = allows smooth movement at a joint – connects the ribs and is a cushion between vertebrae.
  • Ligaments = connect bone to bone at a joint.
  • Tendons = a band of fiber that connects muscles to bones.
what are muscles made of
What are muscles made of?
  • Muscle tissue is
    • ¾ water
    • The remaining ¼ is
      • 20% protein substances
      • 5% nonprotein and mineral substances.
slide18

What is ATP?

    • Adenosine Triphosphate is a nonprotein chemical substance in muscle tissue. It is a source of immediate energy for muscle contraction.

What is Glycogen?

- An organic compound in muscles. Stored in cells and used as the body needs energy.

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