Across
- 2. Carbon dioxide is a by product of what?
- 6. What is the main vein bringing the de-oxygenated blood back to the heart to be pumped back to the lungs
- 8. This has a nucleus, is irregular in shape and protects the body against diseases and fights infection
- 10. What takes blood at a high pressure away from the heart?
Down
- 1. what does the circulatory system keep stable?
- 3. The ____ brings oxygen into the body through the respiratory system
- 4. The heart consists of four what?
- 5. Small blood vessels that sit around the muscles, organs and skin in order to 'feed' those tissues
- 7. What takes blood to the heart
- 9. This is made up of 90% of water and 10% soluble substances