Across
- 3. One of two more muscular lower chambers of the heart that pump blood out of the heart
- 5. one of two upper chambers of the heart that receives blood from the circulatory system
- 7. Contain large amounts of hemoglobin that carries the oxygen
- 8. Contains white blood cells that attack bacteria in the blood and body tissues
- 10. Blood travels away from the heart through this
- 11. A change in blood pressure when the heart beats
- 12. Major air passages that branch off from the trachea
- 14. Also called a windpipe
- 17. Filter substances within the lymphatic system
- 18. Forms clots when a blood vessel is cut or broken
- 19. tiny tubes that connect the veins and arteries
Down
- 1. Deals with viruses and bacteria in the blood
- 2. Blood travels to the heart through this
- 4. Recycles worn-out red blood cells and produces some white blood cells
- 6. Tiny sacs where gas is exchanged in the lungs
- 9. Mostly water, transports substances through circulatory system
- 11. Connects the passages of your nose and mouth to your esophagus
- 13. keeps food from entering your trachea and also contains your vocal cords
- 14. White blood cells that mature in this
- 15. This warms and moistens the air entering your nose
- 16. Act like doors in the heart; they open and close to allow blood to flow only one direction