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Muscles

An introduction to the structure and function of muscles for 7th grade life science
by

Chad Farner

on 27 March 2017

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Transcript of Muscles

The Muscular/Skeletal System
How the Muscles Work
Two Main Types of Muscles
* Voluntary Muscles
Muscles that you are able to control
* Involuntary Muscles
Muscles that you can't consciously control
Skeletal
Cardiac
Smooth
Classification of Muscles
The Function of the Muscular System
They help make all of your
daily movements possible

Muscle Observation Lab
Question #1: What features do you think you will be able to see looking at
a heart or skeletal muscle?

Question #2: What differences do you think you will notice when you
compare the smooth muscles to the skeletal or cardiac muscles?

Observation #1: Sketch a picture of the smooth muscle cells.

Observation #2: Sketch a picture of the cardiac muscle cells.

Observation #3: Sketch a picture of the bone cells.
How Muscles Move Bones
Muscles can only contract.
Muscles work in pairs.
When one muscle contracts the other relaxes.
To raise your arm the following occurs
- your bicep contracts & tricep relaxes
To lower your arm the following occurs
- your tricep contracts & bicep relaxes
Full transcript