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