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!