Respiratory crossword.

1. Tightly regulated, has to stay between 7.35-7.45. Carbon dioxide is dissolved into the blood, causing people to breathe quicker to make sure this level stays within this range.
8. The Chemical compound that is found in high quantities in deoxygenated blood.
9. Spongy organ that is the primary aspect of the respiratory system.
11. What part of breathing happens when oxygen moves into the lungs?
13. Are two large tubes that extend into your lungs and connect to the trachea.
14. The removal of carbon dioxide from the lungs.
16. The organs that help you breathe make up the ______
18. Smallest blood vessels that allow gas exchange to happen.
19. At higher __oxygen molecules are located further apart and oxygen intake is lower.
20. Oxygen and carbon dioxide moving from areas of high concentration to areas of low concentration. Oxygen moves into the capillaries, CO2 into the alveoli.

2. captures and releases oxygen. Found in
3. the Chest part of the body between the neck and the abdomen.
4. a gas that all living things require to breathe.
5. this type of respiration happens when cells convert oxygen and glucose to make ATP
6. red blood cells have a larger so more oxygen gets diffused into the cell.
7. Tiny structures that increase the surface area in the lungs and allow gas exchange.
10. Taking in oxygen and the removal of carbon dioxide.
12. Air travels through the nose and mouth through the
15. Pulls down the lungs, which causes them to expand and therefore fill with oxygen.
17. Blood vessels transporting blood, often oxygen-rich, away from the lungs.