Across
- 2. Tiny blood vessel where gas exchange occurs.
- 5. Blood vessel that carries blood toward the heart.
- 6. Also known as a platelet, helps with blood clotting.
- 9. Vessel carrying oxygen-rich blood from the lungs to the heart.
- 11. Inner lining of the heart chambers.
- 12. Vessel transporting oxygen-poor blood from heart to lungs.
- 14. White blood cell involved in immune defense.
Down
- 1. Muscular layer of the heart wall.
- 3. Largest artery in the body, carries blood from heart to body.
- 4. Lower heart chamber that pumps blood out.
- 5. A Large vein that brings deoxygenated blood to the heart.
- 7. Blood vessel that carries blood away from the heart.
- 8. Protective sac surrounding the heart.
- 10. Upper chamber of the heart that receives blood.
- 13. Red blood cell that carries oxygen.