Muscles PowerPoint 2

How Muscles Work1. Skeletal muscles-when one muscles contracts- another muscle relaxes (they work in teams)2. Muscles always pull- never pushes3. Muscles use glucose4. Produce thermal energy when they contract

Muscle movement Terms

1. Flexion- Movement that reduces a joint angle

2. Extension- A movement that increases a joint angle

Muscle Movement Terms

• Flexing of the hamstring.

• Extension of the quadriceps.

Muscle Movement Terms

Muscle Pairs

• Your muscles work in teams to move your body. An example of this is your Bicep and Tricep.

Types of Injuries

• Strain- Muscle “pull” or “strain”– Tearing a muscle fiber(s), followed by bleeding or

swelling of muscle

– Muscle Cramp- Prolonged contraction of muscle, ion imbalance

Did you know…• Muscles help you…– Open your mouth– Speak– Shake hands– Walk– Talk– Digest food– Smile– Blink– Breathe– Play sports

• Without muscles you wouldn’t be alive!

Muscular system Fun Facts• You have over 30 facial muscles which create looks like

surprise, happiness, sadness, and frowning. • Eye muscles are the busiest muscles in the body. Scientists

estimate they may move more than 100,000 times a day! • The largest muscle in the body is the gluteus maximus

muscle in the buttocks. • There are about 60 muscles in the face. Smiling is easier

than frowning. It takes 20 muscles to smile and over 40 to frown.

Ways to Strengthen the Muscular System

• Exercise at least 3 times a week increasing your heart rate.

• Eat well-balanced meals with vitamins and minerals.

• Can you think of more ways?