Moving Along:

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Moving Along

• The Muscular System

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Parts of the Muscular System

• Muscle
• Tendons

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Muscle

• Muscle is an organ cells and tissues that work
  together.
• The basic unit of a muscle is called a muscle
  cell. Aka muscle fibers
• Since it is a living thing, it needs what?
• There are more than 650 muscles in your body.
• Males weight can be up to 42 muscle.
• Females weight can be about 35

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Do You Want to or Not

• Classifying Muscles
• Voluntary muscles that you can control
• Involuntary when muscles work without you
  controlling them. Ex.?
• Sometimes involuntary muscles can be controlled
  and not controlled. EX.?

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Which is it?
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Voluntary Muscles

• Are usually called skeletal muscles because
  they are attached to the skeletal system.
• They can also be called striated muscles
  because if you look at the muscle under a
  microscope they look like they have stripes.
• Skeletal muscles need lots of food and water.

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Involuntary Muscle

• They work without thinking about it!
• They are found in your skin, blood vessels, and
  in the organs inside your body.
• Cardiac Muscle is only found in your heart.

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Holding it All Together Tendons

• Tendons attach muscle to bone.
• Muscle is attached to bone in two places.
• At one end, the attachment is firm called the
  origin of the muscle.
• The other end is stretchy and is called the
  insertion.

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Common injuries to tendons

• Tendonitis when the covering around tendons
  becomes swollen and very sore.
• Sprain when a muscle, tendon, or ligament has
  been stretched too far.
• Some times tendons can detach from the bone and
  needs to be surgically repaired.

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What's its job?

• Muscular system gives the body extra shape.
• Muscle Tone is the way it looks and works. Good
  muscle tone is developed by using muscles
  properly.
• Hypertrophy muscle size increase in size from
  being used too much.
• Atrophy muscle size is reduced from a lack of use.

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Hypertrophy Atrophy
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Whats its job? Cont.

• Moves the skeletal system
• And pushes materials through passages in your
  body.
• Ex. digestive system, blood vessels, muscles of
  the pupil, cardiac muscles

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Activity

• 1.) Write your name 15 times and record how long
  it took to do so.

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• 2.) Open and close your fist as many times as
  possible for one minute.

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• 3.) Repeat 1 and 2

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• 4.) rest for 5 min. and write your name 15 more
  times

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• How did your hand feel after 1?
• How did your hand feel after the second 15 times?
• And so on?
• How did you hand feel after you rested for 5
  min.?
• Did your hand writing change? How? Why