Skeletal system

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Across
  1. 3. This bone is in your upper arm
  2. 5. also known as the knee bone
  3. 7. these collection of bones makes up your spine
  4. 9. the first of the two leg bones
Down
  1. 1. this bone runs across your neck from shoulder to shoulder
  2. 2. this is a bone in your lower arm
  3. 4. This bone protects your brain
  4. 6. the second of the two leg bones
  5. 8. These bones protect the heart and lungs
  6. 9. This is the largest bone in your body