Respiratory System

3. exchange – The process in which oxygen enters the blood and carbon dioxide leaves it in the alveoli.
4. dioxide – A waste gas produced by cells during respiration and exhaled through the lungs.
5. – A dome-shaped muscle below the lungs that helps with breathing by contracting and relaxing.
7. – Two large tubes that branch from the trachea into each lung, carrying air in and out.
8. – The act of breathing out air containing carbon dioxide from the lungs.
10. – The main organs of the respiratory system where oxygen is absorbed and carbon dioxide is released.
13. – The physical process of inhaling and exhaling air to provide oxygen to the body and remove carbon dioxide.
15. – The act of breathing in air through the nose or mouth into the lungs.
17. – Tiny blood vessels surrounding the alveoli where oxygen and carbon dioxide are exchanged.
18. – Tiny hair-like structures in the airways that trap and move dust and mucus out of the lungs.
19. – Tiny air sacs in the lungs where gas exchange between oxygen and carbon dioxide takes place.

1. – The process of exchanging gases (oxygen and carbon dioxide) between the body and the environment.
2. – Relating to the lungs or the respiratory system.
6. – The throat; a passageway for both air (to the lungs) and food (to the esophagus).
9. – A gas essential for life that the body takes in through the lungs and uses to produce energy.
11. – Also called the windpipe; a tube that connects the throat to the bronchi and allows air to pass to the lungs.
12. cavity – The space inside the nose that filters, warms, and moistens the air we breathe.
14. – Smaller branches of the bronchi that lead air to the alveoli.
16. – The path that air follows to reach the lungs, including the nose, trachea, and bronchi.
20. – Also known as the voice box; it contains the vocal cords and is involved in breathing and sound production.