M2 BASIC RESPIRATORY SYSTEM

1. A condition that makes it hard to breathe and can be made worse by dirty air or dust.
4. death – Dying earlier than expected, often because of disease or harmful substances.
5. A dome-shaped muscle that moves up and down to help us breathe.
7. The body part we use to smell and to take in air when breathing.
10. (grasshoppers) – Small holes on a grasshopper's body where air enters for breathing.
11. (fish) – Body parts that fish use to take oxygen from water.
13. The process where cells use oxygen to turn sugar into energy.
14. The act of breathing out air from the lungs.
15. Cells in the blood that carry oxygen from the lungs to the rest of the body.
17. lungs (spiders) – Flat, folded structures that spiders use to breathe.
19. Two organs in the chest that take in oxygen and remove carbon dioxide.
20. system The group of organs that help us breathe and exchange gases like oxygen and carbon dioxide.

2. Dirty or harmful substances in the air that can make people, animals, and plants sick
3. an aquatic animal that doesn't have respiratory system
4. Very tiny particles in the air that can be breathed deep into the lungs and cause health problems.
6. The act of breathing in air through the nose or mouth.
8. gas in the air that we breathe in and our body uses to make energy.
9. Tiny air sacs in the lungs where oxygen enters the blood and carbon dioxide leaves.
12. A gas that our body makes and breathes out after using oxygen.
16. very small blood vessel where gases like oxygen and carbon dioxide move in and out of the blood.
18. Tiny particles in polluted air that we can breathe in, which can harm our lungs.