Across
- 3. carries the deoxygenated blood back to the heart
- 5. carries oxygen-rich blood to the body
- 8. means: "branch"
- 10. the molecule inside the RBC which contains Iron,
- 12. the RBC are smaller than a human _______.
Down
- 1. the number of pairs of spinal nerves that go to control heart function
- 2. stands for iron
- 4. small saclike min organs in the lungs; this is where the blood gets re-oxigenated
- 5. pumps the blood into the ventricle.
- 6. the cell that carries the oxygen to the entire body.
- 7. the smallest of all blood vessels
- 9. the number of "loops" the human circulatory system makes.
- 11. a fluid more voluminous than blood