need a reason to smile today? there are about 60 muscles in the face. it takes about 40 muscles to...

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Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier than frowning!

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The Muscular System

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Page 1: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

Need a reason to smile today?

There are about 60 muscles in the face.

It takes about 40 muscles to frown, but only 20 muscles to smile.

Smiling is easier than frowning!

Page 2: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

There are about 650 muscles in the human body!

Page 3: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

The Muscular System

Page 4: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

The Muscular System

• Functions:– Movement– Warmth– Posture

• Muscle Properties:– Ability to contract– Ability to stretch– Ability to respond to a stimulus

Page 5: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

3 Types of Muscles

• Smooth: not under voluntary control (stomach, blood vessels, intestines)

• Cardiac: not under voluntary control (heart)

• Skeletal: responsible for voluntary movements (attached to bone)

Page 6: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

Bicep

Tricep

Straighten your arm.

What happens to your biceps?Your triceps?

Now bend your arm.

What happens to your biceps?Your triceps?

Page 7: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

Most skeletal muscles work in opposing pairs.

When one muscle contracts, the other

relaxes!

Page 9: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

Which type of muscle helps you digest your food?

A. SmoothB. CardiacC. SkeletalD. None of the above

Page 10: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

What type of muscle plays a role in involuntary movements?

A. SmoothB. CardiacC. SkeletalD. None of the above

Page 12: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

What type of muscle is your Achilles Tendon?

A. SmoothB. CardiacC. SkeletalD. None of the above

Tendons are not muscles! Tendons are a type of connective tissue & actually

belong to the skeletal system!

Page 13: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

Muscular Dystrophy

• A genetic disease that weakens the muscles – No cure

Video to 2:40

Page 14: Need a reason to smile today? There are about 60 muscles in the face. It takes about 40 muscles to frown, but only 20 muscles to smile. Smiling is easier

Muscle Fatigue Activity

• How many times can you squeeze the clamp?