Across
- 1. a colorless cell that circulates in the blood
- 3. a type of blood cell responsible for carrying oxygen to the body's tissues
- 6. the middle, muscular layer of the heart wall, responsible for the heart's pumping action.
- 10. veins that carry oxygenated blood from the lungs back to the heart, specifically the left atrium
- 12. a double-layered sac that surrounds the heart, protecting and lubricating it
- 14. the smallest blood vessels that connect arteries to veins
- 15. each of the two upper cavities of the heart from which blood is passed to the ventricles.
Down
- 2. the thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves.
- 4. a blood vessel that carries oxygenated blood away from the heart to the body's tissues and organs.
- 5. the largest artery in the human body, responsible for carrying oxygen-rich blood from the heart to the rest of the body
- 7. a hollow part or cavity in an organ.
- 8. another term for platelet.
- 9. the artery carrying blood from the right ventricle of the heart to the lungs for oxygenation.
- 11. A large vein that carries blood to the heart from other areas of the body.
- 13. a blood vessel that carries blood from the body's tissues back to the heart.