Across
- 2. classification of blood based on the presence or absence of certain antigens
- 4. fights and absorbs bacteria
- 6. a heart rate that is too fast
- 8. unusual sound heard between heartbeats
- 9. carries blood towards the heart
- 10. the rhythmical throbbing of blood against arteries
- 11. the smallest type of blood vessel
- 13. a deficiency of red blood cells
- 14. sudden loss of oxygen to the brain
Down
- 1. high blood pressure
- 3. the outermost layer of the heart
- 5. an irregular heartbeat
- 7. a lifesaving technique used when someone's heart and breathing have stopped
- 10. holds all blood cell types as well as nutrients
- 12. a genetic marker in blood