Across
- 5. Leads to the lungs and divides into tubes.
- 7. a system used to type blood.
- 10. Small tubes originating from the bronchi
- 14. Carry blood back towards the heart.
- 15. Chambers that receive blood returning to the heart.
- 17. Carries oxygen
- 20. Cells whose primary job is to defend the body.
- 22. When an area of the brain dies.
- 23. Blood vessels that carry blood away from the heart.
- 24. Collect oxygen-poor blood from the body
- 25. A muscular tube where air passes through from the nostrils. It serves as a passageway for air and food.
- 26. A passageway for air. It is also called the voicebox.
- 27. A condition in which the oxygen carrying capacity of the blood is reduced.
- 29. Series of pressure waves within an artery caused by contractions of the left ventricle.
- 30. A flap of tissue that ensures that the blood or fluid does not backflow.
Down
- 1. A system that collects and recycles fluids leaked by the cardiovascular system. It is involved in fighting infections.
- 2. A system that functions like a network of highways.
- 3. one of the largest artery of the body
- 4. Powerful muscle spanning the rib cage under the lungs.
- 6. An antigen found in the surface of the blood.
- 8. Also known as the windpipe. It is a long straight tube in the chest cavity.
- 9. Carries freshly oxygenated blood to the heart muscle
- 11. Force exerted by blood as it moves through blood vessels.
- 12. Thick-walled chambers that pump blood away from the heart
- 13. Small cluster of cardiac muscle that initiates contraction of the heart. It is embedded in the upper wall of the right atrium.
- 16. Tiny blood vessels that allow gas exchange in the blood.
- 18. Occurs when an area of the heart muscle stops and dies.
- 19. Plays an important role in blood clotting.
- 21. Liquid portion of the blood.
- 28. Cluster of air sacs. It is where gas exchange happens.