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Science Lesson 8 Muscles and Bones

Science Lesson 8 Muscles and Bones. What to think about…. What are the functions of muscles? How do muscles work? What are some of the different types of muscles? What happens to muscles based upon their amount of use?. Muscles and bones are joined or attached by tissue called. tendons.

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Science Lesson 8 Muscles and Bones

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  1. Science Lesson 8 Muscles and Bones

  2. What to think about…. • What are the functions of muscles? • How do muscles work? • What are some of the different types of muscles? • What happens to muscles based upon their amount of use?

  3. Muscles and bones are joined or attached by tissue called tendons • It is the tendons that allow muscles to move the bones.

  4. All body movement requires muscles. What if we are not moving? • Even sitting still we are using muscles. The heart beats, the diaphragm causes us to breathe, etc.

  5. About how much of your body weight is muscle? 50%

  6. What the Muscle Is Made Of? • Your muscles are made of small muscle fibers. • Tendons are stretchable material that connects • the muscles to your bones.

  7. How do our muscles work? Our muscles work by contracting and relaxing

  8. How do muscles work? contracting • Muscles work by and . relaxing Skeletal muscles make us move. However, muscles are only capable of one type of force. pulling

  9. Since muscles can only pull and not push, how does this effect the way they work in the body? • The muscles have to work in pairs. One muscle of a pair bends a joint, while the other straightens it back out.

  10. Tricep Bicep • When the bicep contracts and the triceps relaxes, the arm bends. • When the Tricep contracts and the bicep relaxes the arm straightens.

  11. weak flabby • When you don’t use your muscles they become and . • Unused muscle cells actually become smaller if not used regularly.

  12. But, if used regularly, they become larger and stronger.

  13. How to Make Healthy Muscles!!! • Run • Lift weights • Play sports • Drink milk • Eat healthy food

  14. Facts about the muscles!!! • Your heart is a muscle. • Your tongue is a muscle. • There are about 350 muscles in the human body. • Muscles are made of fibers. • The muscular system is the largest system in your body.

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