Heart and Lungs

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Across
  1. 2. These tubes bring the blood back to the heart.
  2. 3. These tubes bring oxygen-rich blood to all the parts of your body.
  3. 7. The part of the blood that helps fight off germs.
  4. 9. These sacs are where oxygen is given to the blood.
  5. 10. These tiny tubes bring air deep into the lungs. Some are as thin as a single hair!
  6. 12. The windpipe that brings air into the body.
Down
  1. 1. The part of the blood that clots the blood.
  2. 4. The part of the blood that brings oxygen to parts of the body.
  3. 5. The protein that carries the oxygen.
  4. 6. There are 4 ________ in the heart.
  5. 8. The organ that brings air into our bodies.
  6. 11. The organ that pumps blood around the body.