The Muscular System
By: Laura Brownstead, Caroline Bennett, Christy Brock, and Katie Rogers
Main Parts Of The Muscular System
● Orbicularis Oculi ● Frontalis● Trapezius● Deltoid● Triceps brachi● Biceps brachi● Rectus Abdominus
Main Parts Of The Muscular System
● Rectus femoris● Sartorius● Gastrocnemius● Soleus● Pectoralis major● External Obliques● Tibialis anterior
Types of MuscleThere are three different types of muscles
● Cardiac muscles○ muscles that
are in the heart.● Skeletal muscles
○ Under control of the nervous system.● Smooth muscles
○ hollow places like the stomach, and blood vessels.
Sprain● A sprain is an injury involving the stretching or
tearing of a ligament
● Can cause instability in a joint
Symptoms● pain, inflammation, and in some cases, the inability to
move a limb
Strain
● Strains are injuries that involve the stretching or tearing of a muscle or tendon
● Occur when a muscle is stretched and suddenly contracts.
Symptoms● pain, muscle spasm, loss of strength, and limited range of motion
Muscular Dystrophy● Genetic disorder that weaken the muscles that helps
the body move● Not contagious, people with MD have incorrect
information in their genes● Weakens muscles over time, can cause inability to do
things most people take for granted
Cramp● Caused when muscle tightens and then shortens● Most common area to get a cramp is in the calfs● Caused from over extension and dehydration● Low blood sugar, and extreme cold or heat can also
cause cramping
Interesting Facts
● 17 muscles to smile, 42 to frown● Eye muscles are the busiest of all, they move up to
100,000 times a day● Muscles account for approximately 40% of your body
weight.● The smallest muscle in your body is the Stapedius,
moves the stapes bone in your middle ear● The strongest muscle of the body is the masseter
muscle used for chewing!
More Interesting Facts● If all your muscles could pull in one direction you could
create a force of 25 tons● Muscle weighs more than fat● Muscles grow when you are resting not when you are
working them● There are more than 600 voluntary muscles in the
body.● You use 200 muscles every step you take● Your largest muscle in your body is the Gluteus
Maximus● Muscles Make You Stronger
http://www.youtube.com/watch?v=vvBWnQJHGBshttp://www.youtube.com/watch?v=vvBWnQJHGBs
Review Questions
1. Does it take more muscles to frown or to smile?
2. What is the difference between a sprain and a strain?.
3.What are the three different types of muscles?
Thank You
Thanks for watching our slideshow on the muscular system!
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