Across
- 2. Cell fragments involved in blood clotting
- 4. Red blood cells responsible for transporting oxygen
- 11. Recording of electrical activity of the heart showing P QRS and T waves
- 13. Largest artery in the body carrying blood from the left ventricle
- 14. White blood cells that develop into macrophages in tissues
- 17. White blood cells involved in allergic reactions and parasite defense
- 18. Microscopic vessels where exchange of gases nutrients and wastes occurs
- 19. Specialized connective tissue that transports oxygen nutrients and wastes in the body
Down
- 1. Blood vessels that carry blood away from the heart
- 2. Liquid component of blood that makes up about 55 percent of blood volume
- 3. Process of blood cell production in bone marrow
- 5. Protective sac surrounding the heart
- 6. Inner lining of blood vessels that reduces friction during blood flow
- 7. Blood vessels that return blood to the heart
- 8. Rare white blood cells that release histamine during inflammation
- 9. Most abundant white blood cells that destroy bacteria by phagocytosis
- 10. Protein in red blood cells that binds oxygen
- 12. White blood cells responsible for specific immune responses
- 15. Thick muscular middle layer of the heart wall responsible for pumping
- 16. White blood cells that protect the body against infection