Across
- 3. Color of mollusk blood (no hemoglobin!)
- 5. World's #1 killer disease
- 10. Hair-thin blood vessels
- 12. Largest artery in the body; 'highway' from the heart
- 13. Invented in 1816 to avoid awkward ear-to-chest exams
- 14. Classic heartbeat sound
- 15. 60,000 miles of body “roads” for blood
Down
- 1. Its heart can beat as slow as 2 bpm underwater
- 2. Broken heart, literally
- 4. Most heart attacks happen on this stressful weekday
- 6. Lower heart chamber—Latin for “little belly”
- 7. Fist-sized organ that pumps 2,000 gallons daily
- 8. Heart-healthy habit that’s contagious
- 9. Clear part of eye with no blood supply
- 11. Upper heart room—Latin for “entrance hall”