Across
- 3. tiny blood vessels that help connect your arteries and veins, aid in gas exchange
- 5. small vein that can collect blood from capillaries
- 7. two upper chambers of the heart
- 9. a large vein that carries deoxygenated blood to the heart
- 12. tubes in the body that carry deoxygenated blood towards the heart
- 13. small branch of an artery leading into capillaries
- 15. blood vessels that deliver oxygenated blood from the heart to different parts of the body
- 16. lacking oxygen in the blood
Down
- 1. muscle fibers in the right atrium responsible for initiating the heartbeat
- 2. various membranous structures whose function is to temporarily close passages or orifices
- 4. veins veins that receive blood from the arteries and ventricles
- 6. main artery of the body that supplies oxygenated blood to the circulatory system
- 8. blood that is enriched with oxygen
- 9. two lower chambers of the heart
- 10. dioxide a colorless, oderless gas produced by burning carbon and organic compounds
- 11. to grow less
- 14. pair of organs in the chest that supplies the body with oxygen and removes carbon dioxide