Across
- 1. alternating contraction and expansion of arteries due to the pumping of blood by the heart
- 2. describe the bright red blood that has been supplied with oxygen in blood
- 4. blood vessels that carry blood back to the heart
- 5. the red pigment in red blood cells that carries oxygen
- 6. describe blood from which some oxygen has been removed
- 7. minute tubes carrying blood to body cells
- 11. electronic device inserted in the chest to keep the heart beating regularly at the correct rate
- 12. contraction of the heart muscle occurring about 60-100 times per minute
Down
- 1. the yellowish, liquid part of blood that contains water, minerals, food and wastee from cells
- 3. red blood cells
- 4. flap like folds in lining of a blood vessel or other hallow organ that allow a liquid
- 8. not having enough iron
- 9. white blood cells
- 10. the hollow tubes with thick walls that carry blood from the heart to other parts