Across
- 4. Beat of the heart as felt through the walls of the arteries.
- 6. Largest vein in the body.
- 8. Small vein.
- 9. Largest artery in the body.
- 11. One of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart.
- 12. One of two lower chambers of the heart.
- 13. Lower tip of the heart.
- 14. Double-layered membrane surrounding the heart.
- 15. Largest type of blood vessel; carries blood away from the heart to all parts of the body.
Down
- 1. Gas released by body cells, transported via veins to the heart, and then to the lungs for exhalation.
- 2. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.
- 3. Valve between the left atrium and the left ventricle; bicuspid valve.
- 5. Inner lining of the heart.
- 7. Small artery.
- 8. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction.
- 10. Smallest type of blood vessel.