Transcript Moving Along: The Muscular System

Moving Along:
The Muscular System
Parts of the Muscular System
Muscle
Tendons
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%
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.?
Which is it?
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.
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.
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”.
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.
What's it’s 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.
Hypertrophy
Atrophy
What’s it’s 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
Activity
1.) Write your name 15 times and
record how long it took to do so.
2.) Open and close your fist as many
times as possible for one minute.
3.) Repeat 1 and 2
4.) rest for 5 min. and write your
name 15 more times
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