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