Across
- 5. Carries deoxygenated blood from the body to the heart.
- 6. Encloses the heart.
- 10. Carries oxygen-poor blood to right side of heart.
- 12. Largest artery in the human body.
- 13. Blood vessels that carry deoxygenated blood.
- 14. Lower cavities of the heart.
Down
- 1. Thickest layer of the heart wall.
- 2. Receives oxygen-rich blood and sends it to left atrium.
- 3. Thin, smooth membrane
- 4. The network between arterioles and venules.
- 7. Carries oxygen to the body's tissues and carbon dioxide to the lungs.
- 8. A colorless cell that circulates in the blood and body fluids and counteracts foreign substances and diseases.
- 9. Plays a role in blood clotting.
- 11. The upper cavities of the heart.