1. Muscles PowerPoint 2

2. How Muscles Work 1. Skeletal muscles-when one muscles contracts- another muscle relaxes (they work in teams) 2. Muscles always pull- never pushes 3. Muscles use glucose 4. Produce thermal energy when they contract

3. Muscle movement Terms 1. Flexion- Movement that reduces a joint angle 2. Extension- A movement that increases a joint angle

4. Muscle Movement Terms Flexing of the hamstring.

5. Extension of the quadriceps. Muscle Movement Terms

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

7. 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

8. Did you know… Muscles help you… 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! Without muscles you wouldn’t be alive!

9. Muscular system Fun Facts You have over 30 facial muscles which create looks like surprise, happiness, sadness, and frowning. 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! 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. 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. There are about 60 muscles in the face. Smiling is easier than frowning. It takes 20 muscles to smile and over 40 to frown.

10. Ways to Strengthen the Muscular System Exercise at least 3 times a week increasing your heart rate. Exercise at least 3 times a week increasing your heart rate. Eat well-balanced meals with vitamins and minerals. Eat well-balanced meals with vitamins and minerals. Can you think of more ways? Can you think of more ways?