1. How Do Bones and Muscles Work?
The Skeletal System
How a Broken Bone Heals?
How Joints Help You Move?
What Muscles Do and How Muscles Help you Move?
Different Kinds of Muscles
Hands-on Activity

2. The Skeletal System Test
About two hundred bones make up your body skeleton. Your skeleton does for your body what a hand does for a puppet. The bones of your skeleton give shape to your body. Your bones also support you. Bones also work with muscles to help you move in all the ways that you do.
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3. The Skeletal System Test
Parts of the skeleton also protect your soft organs. The skull protects your brain like a built-in helmet. The ribs protect your heart and lungs.
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4. The Skeletal System Test
Bones come in many shapes and sizes, as the picture of a skeleton shows. Bones are hard but not solid. The longest and the thickest bone is the one between your hip and knee. Its strength helps hold you upright as you run and kick.
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5. The Skeletal System Test When you were born, your
skeleton was made mostly of
a rubbery tissue called
cartilage. As you grow, bone
replaces most of the
cartilage. However, some
cartilage remains. For
example, your ears and the
tip of your nose are made of
cartilage. That is why you
can bend them.
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6. Review Test About how many bones make up your skeleton system?
Which part of your body has a bowl shape?
Which part of your body does the “Skull” protect?
Some parts of your skeleton have a rubbery tissue. What is this tissue called?
100 bones
200 bones
Brain
Heart
Ligaments
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7. How a Broken Bone Heals Test
Bones are strong. However, accidents can cause bones to break. Pictures called X rays help doctors see broken bones.
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8. How a Broken Bone Heals Test Because it is a living tissue,
a broken bone can heal. A
doctor can help the bone
heal correctly by placing
the injured part in a cast
like the one shown. A cast
holds a broken bone in the
correct position while it
mends.
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9. How a Broken Bone Heals Test
Bone starts to mend soon after a break occurs. New bone cells begin to form. In a few days, spongy bone tissue fills the space between the broken ends of the bone. In the weeks that follow, the spongy tissue hardens until the bone is completely mended.
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10. Review Test How do doctors see broken bones?
What can a doctor make to help heal a broken bone?
How do broken bones heal?
X-rays
Z-rays
Cast
Sling
New bone forms
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11. How Joints Help You Move
The place where two bones of
the skeleton come together is
called a joint. By themselves,
bones are stiff. Joints allow
movement. They give your
skeleton its ability to bend,
twist, and turn.
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12. How Joints Help You Move
A layer of cartilage covers the ends of bones that meet at joints. The cartilage keeps the bones from grinding together and wearing out. Tissues called ligaments hold bones together at joints.
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13. Review Test What helps your skeleton to bend?
What keeps your bones from grinding down and wearing out?
What tissue holds bones together at a joint?
Joints
Cartilage
Ligaments
Muscles
Fat
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14. What Muscles Do and How Muscles Help You Move
A muscle is a tissue made of muscle cells. Muscles have the job of making other body parts move. Muscles also help give your body its shape and help protect the soft organs inside you.
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15. What Muscles Do and How Muscles Help You Move
Your muscular system includes more than six hundred muscles. Most of those muscles move bones, allowing you to walk, lift, or kick a ball.
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16. What Muscles Do and How Muscles Help You Move
Some muscles move body parts that are not bones. The muscles that move your eyebrows and lips help you smile, frown, or make a funny face. You can speak and sing because muscles move your lips, tongue, and lower jawbone.
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17. What Muscles Do and How Muscles Help You Move
Muscles are attached to bones by cords called tendons. You can feel a tendon at the back of each ankle.
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18. What Muscles Do and How Muscles Help You Move
Muscles can move bones
because muscle cells can
change their shape. Make a
fist and lift it toward your
shoulder. Notice how the
muscle in your upper arm
feels thick and hard. That is
because the muscle cells
contracted, or got shorter, to
make the movement.
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19. Review Test What tissues give your body it’s shape?
List one thing that your muscles do in your face?
How do muscles make your body move?
What attaches muscles to bones?
Muscles
Frown
Walk
Contract
Tendons
Cartilage
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20. Different Kinds of Muscles
Arm muscles are examples of voluntary muscles. You can control what they do and when they do it.
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21. Different Kinds of Muscles
Your heart is a special kind of involuntary muscle. It looks something like a voluntary muscle and something like an involuntary muscle. However, it works without your control.
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22. Review Test What kind of muscles is in your arms?
What kind of muscles is your heart made of?
What kind of muscles helps your digestion system?
What kind of muscles helps you to run?
 Voluntary muscles
Voluntary muscles
Involuntary muscles
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23. Help Test Next Button------------------- Back Button------------------
Home
Final Test
Listen to the Sound
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24. Final Test
This is the final test of the program. You will have ten multiple choice questions. Please choose the correct answer from the choices given for each question and then click the next arrow to go to the next question.
You can not go back or go to the main menu until you finish the test. If you feel that you need to review more before taking the test, please click the home button and review the sections you need until you feel comfortable to take the test.

25. Final Test 1. To which body system do bones belong? Circulatory
Digestive
Skeletal
Muscular A B C D

26. Incorrect The correct answer is Skeletal

27. Correct Good Job

28. Final Test
2. What holds a broken bone in the correct position while it mends?
Cast
Microscope
Muscles
X ray A B C D

29. Incorrect The correct answer is cast

30. Correct Good Job

31. Final Test 3. What do most muscles move? Bones The heart The lungs
Other muscles A B C D

32. Incorrect The correct answer is bones

33. Correct Good Job

34. Final Test
4. Which organ pumps blood and is made up of involuntary muscles?
Brain
Lungs
Heart
Skin A B C D

35. Incorrect The correct answer is heart

36. Correct Good Job

37. Final Test
5. If a joint wears out, which one of the structures below would be mostly the problem?
Muscles
Cartilage
Ligaments
Tendons A B C D

38. Incorrect The correct answer is cartilage

39. Correct Good Job

40. Final Test
6. Which one of the structures below is most important to help muscles move your body?
Cartilage
Ligaments
Tendons
Skeleton A B C D

41. Incorrect The correct answer is tendons

42. Correct Good Job

43. Final Test 7. What can a doctor use to see if you broke a bone?
Bone pictures
By exercises
X ray
Cast A B C D

44. Incorrect The correct answer is X ray

45. Correct Good Job

46. Final Test
8. If you kick a ball, which one of the structures is most important?
Ligaments
Tendons
Voluntary muscles
Involuntary muscles A B C D

47. The correct answer is voluntary muscles
Incorrect
The correct answer is voluntary muscles

48. Correct Good Job

49. Final Test
9. Which structure provides the most protection for your organs?
Muscles
Skeleton
Ligaments
Tendons A B C D

50. Incorrect The correct answer is muscles

51. Correct Good Job

52. Final Test 10. Which one of the following does not have cartilage?
Nose
Ear
End of bones in a joint
Heart A B C D

53. Incorrect The correct answer is heart

54. Correct Good Job

55. Thank you

56. Hands-on Activity
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