Across
- 4. a large vein that carries deoxygenated blood from the body back to the heart
- 5. muscular chamber that pumps blood out of the heart and into the circulatory system
- 7. a vital part of the body's immune system, playing a key role in fighting infections and defending against foreign invaders
- 9. the smallest type of blood vessel in the body
- 10. tiny cell fragments in the blood that play a crucial role in blood clotting, preventing and stopping bleeding
- 11. muscular tissue that forms the middle layer of the heart wall
- 13. functional components of blood responsible for transporting gases and nutrients throughout the human body
- 14. a double-layered sac that surrounds the heart and its roots
Down
- 1. a blood vessel that carries oxygen-rich blood from the lungs back to the heart
- 2. the largest artery in the human body, carrying oxygenated blood from the heart to the rest of the body
- 3. a chamber in the heart that receives blood from the body or lungs and pumps it into a ventricle
- 4. a blood vessel that carries blood from the body's tissues back to the heart.
- 6. the innermost layer of the heart wall, lining the chambers and valves
- 8. a major blood vessel that carries deoxygenated blood from the heart's right ventricle to the lungs for oxygenation
- 12. a blood vessel that carries oxygenated blood away from the heart to the rest of the body