Chapter 11: The Muscular System Muscle Organization & Function (Interactive pgs. 327-330)
The Muscular System Pgs 46-47. Intro Video 2 Functions of the muscular system.
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Transcript of The Muscular System Pgs 46-47. Intro Video 2 Functions of the muscular system.
The Muscular System
Pgs 46-47
Intro Video
•2 Functions of the muscular system
1st Function of the muscular system
Function of the muscular system
•Provides movement
• In conjunction with the skeletal system
2nd Function of the muscular system
2nd Function of the muscular system
•Helps organs carry out life functions
•3 Types of Muscles
1st Type of Muscle
• .
•Skeletal Muscles
Properties of Skeletal Muscles
•Majority of your muscles
Striated
• Striped appearance
Connect to bones with
• tendons
They are voluntary
These muscles help you move.
React quick, but also tire quick
How muscles deal with getting tired
•The fibers inside alternate being used
• Take a pencil
• Fold a paper clip so it is resting on the pencil
• Not supporting paper clip in any way and it must remain perpendicular to paper
• Try to make the paper clip stay still
• Or hold above paper and try to make stay still
It’s a good thing your heart is not made of Skeletal Muscle
• How long can you make your hand a heart
• Open fully and close every second
2nd Type of Muscle
• Smooth Muscle
• Smooth Muscles: found
• in the walls of internal organs and the blood vessels.
They are involuntary
They react slowly and and tire more slowly than skeletal muscle.
3rd Type of Muscle
• Cardiac Muscles
Cardiac Muscles: • Muscles that
make up the heart.
• Striated
They are involuntary
Cardiac Muscles
•The muscle can contract repeatedly, it will not tire.
What a real heart beating looks like
http://www.youtube.com/watch?annotation_id=annotation_611436&feature=iv&src_vid=Pes9O5
z8efk&v=uR4t__B-Zwg
Why do your muscles feel “bigger”?
Figure it out based on animation
• http://www.edumedia-sciences.com/en/a85-biceps-and-triceps
Muscles Work in Pairs
• Muscles can only contract, they do not extend or get larger.
• Skeletal muscles work in pairs so when one contracts the other relaxes.
• Examples: Biceps/Triceps, Hamstring/Quadriceps
String can only pull not push
• String on both sides of a ruler demonstration
Smart Board Venn Diagram
Bpop
Muscle Practice sheet