Across
- 2. this is the upper chamber of the heart
- 5. these transfer the oxygenated blood from the lungs to the heart.
- 6. this organ pumps blood around the body
- 10. the smallest blood vessel that the human eye can only see under a microscope
- 12. this element has the symbol O
- 13. this is the largest chamber in the heart
Down
- 1. examples of this include heart, lungs, skin.
- 2. a blood vessel that takes blood away from the heart to the rest of the body
- 3. this returns the blood from the upper body such as the head and neck
- 4. this is also known as the cardiovascular system
- 7. a blood vessel that carries blood towards the heart
- 8. these control the flow of blood
- 9. this substance runs through your vein
- 11. this is the main and largest artery in the human body