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Lesson 3 - Muscles

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Paul Solarz
Paul Solarz

This lesson discusses how muscles move our bones. Muscles are stretchy structures that contract and pull on bones, as bones cannot move themselves. There are over 630 muscles in the human body, which are attached to bones by tendons. Muscles work in pairs called antagonist muscles to move limbs in opposing directions. Common muscle injuries include strains, sprains and tendonitis, which should be treated with the RICE method of rest, ice, compression and elevation.

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Chapter 2 Lesson 3 Moving our Bones! In this lesson, we will learn how muscles move our bones! Created by Mr. Stephen Wentz Council Rock School District
Question? What moves our bones? Do they move on their own, or does something move them?
How do our bones move? Bones dont move on their own, muscles pull on the bones to move them! Everyone stand up where you are Straighten your arms Now curl them up What do you feel happening?
How do our bones move? Muscles- stretchy structures in the body that have the special ability to contract, or shorten. - Muscles can only pull, not push. - They pull on our bones to make them move. - A human has about 630 muscles!!! - Muscles are attached to our bones by tendons. Tendons- rope-like structures that attach muscles to bonestendons are not stretchy like ligaments.
How do our bones move? Since muscles can only pull, when they stop pulling they relax and get longer and thinner. When one muscle pulls in one direction, another muscle is used to pull it back in the other direction. Antagonist Muscles- pairs of muscles that work against each other, but in a good way. They work together to move our limbs. When the triceps contract, your lower arm goes back down. When the biceps contract, your lower arm goes up.
Muscle Injuries Most everyone will, or has, injured a muscle. Ex: 1. Sprain- happens when a ligament is stretched too far. Sometimes ligaments can rip or tear too. 2. Strain- when a muscle or tendon is stretched too much or torn. 3. Tendonitis- occurs when you over do an activity, or repeat it again and again.
What to do for muscle injuries The initials RICE can help you remember how to treat these injuries Rest Ice Compression Elevation Stay off the injury as much as possible. Ice the injury for 20 minutes at a time for the first 2-3 days. Put pressure/bandage wrap on the injury so its snug and will prevent you from stressing it again. Keep the injured body part elevated, or raised, to prevent too much blood flowing to it. This will limit swelling!
Cool Muscle Facts!! It takes 72 muscles in your face, mouth, jaw and tongue to say a word! It takes 200 muscles in your legs, buttocks, feet and back to take a single step! Erasistratus, was a Greek doctor and teacher who lived more than 2,000 years ago. He was the first to write about muscles moving bones. However, he thought that spirits flowed through the body to cause this to happen!

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Lesson 3 - Muscles

  • 1. Chapter 2 Lesson 3 Moving our Bones! In this lesson, we will learn how muscles move our bones! Created by Mr. Stephen Wentz Council Rock School District
  • 2. Question? What moves our bones? Do they move on their own, or does something move them?
  • 3. How do our bones move? Bones dont move on their own, muscles pull on the bones to move them! Everyone stand up where you are Straighten your arms Now curl them up What do you feel happening?
  • 4. How do our bones move? Muscles- stretchy structures in the body that have the special ability to contract, or shorten. - Muscles can only pull, not push. - They pull on our bones to make them move. - A human has about 630 muscles!!! - Muscles are attached to our bones by tendons. Tendons- rope-like structures that attach muscles to bonestendons are not stretchy like ligaments.
  • 5. How do our bones move? Since muscles can only pull, when they stop pulling they relax and get longer and thinner. When one muscle pulls in one direction, another muscle is used to pull it back in the other direction. Antagonist Muscles- pairs of muscles that work against each other, but in a good way. They work together to move our limbs. When the triceps contract, your lower arm goes back down. When the biceps contract, your lower arm goes up.
  • 6. Muscle Injuries Most everyone will, or has, injured a muscle. Ex: 1. Sprain- happens when a ligament is stretched too far. Sometimes ligaments can rip or tear too. 2. Strain- when a muscle or tendon is stretched too much or torn. 3. Tendonitis- occurs when you over do an activity, or repeat it again and again.
  • 7. What to do for muscle injuries The initials RICE can help you remember how to treat these injuries Rest Ice Compression Elevation Stay off the injury as much as possible. Ice the injury for 20 minutes at a time for the first 2-3 days. Put pressure/bandage wrap on the injury so its snug and will prevent you from stressing it again. Keep the injured body part elevated, or raised, to prevent too much blood flowing to it. This will limit swelling!
  • 8. Cool Muscle Facts!! It takes 72 muscles in your face, mouth, jaw and tongue to say a word! It takes 200 muscles in your legs, buttocks, feet and back to take a single step! Erasistratus, was a Greek doctor and teacher who lived more than 2,000 years ago. He was the first to write about muscles moving bones. However, he thought that spirits flowed through the body to cause this to happen!