Respiratory System Vocabulary

Respiratory System- the organ system that enables you to take in oxygen and get rid of Carbon Dioxide. Respiratory Pathway Nose- air enters your body through your nose. Jobs of the nose- 1. Cleans 2. Moistens 3. Warms

4. Cilia- Hair-like structures lining the passageways of the nose. 5. Cilia job- as air moves through these passageways the cilia moves back and forth filtering out tiny bits of dirt.

6. Capillaries- Found on the inner surface of the nose 6. Capillaries- Found on the inner surface of the nose. They are tiny blood vessels and they warm the air. 7. Coarse Nose Hairs- also filter dust and dirt particles. 8. Why do you breathe through the nose? Nose breathing is better than mouth breathing. Mouth breathing gives you more air but the air is not filtered.

9. Pharynx- back of your throat. The pharynx ends with 2 tubes 9. Pharynx- back of your throat. The pharynx ends with 2 tubes. One tube is the esophagus (for food) 10. Trachea- the other tube that is for air. This is how air gets to your lungs. 11. Epiglottis- the small door that covers the trachea so food does not go down the wrong pipe. The door is open for talking, breathing and laughing.

12. Larynx- voice box. Contains your vocal cords 12. Larynx- voice box. Contains your vocal cords. Vocal cords are flexible bands of tissue. When you speak air moves from the lungs and causes the vocal cords to vibrate. The vibration is what makes our sounds.

13. Trachea- Tube that connects your nose and mouth to your bronchi 13. Trachea- Tube that connects your nose and mouth to your bronchi. You can feel ridges an bumps when you rub your neck. 14. Ridges-these bumps or ridges are actually cartilage rings that keep your trachea open.

15. Cilia- the inner lining of the trachea has cilia 15. Cilia- the inner lining of the trachea has cilia. Cilia act like brooms sweeping dirt and dust up the trachea. When you cough these particles are pushed up and out of the throat. Smoking causes the cilia to stop working.

16. Bronchi- air from the trachea passes into the 2 bronchi 16. Bronchi- air from the trachea passes into the 2 bronchi. One leading to each lung. These carry air to the lungs. 17. Bronchioles- inside the lungs. Smaller and smaller branches from the bronchi. The smallest of these branches are called bronchioles.

18. Alveoli- at the end of the bronchioles are microscopic air sacs called alveoli. The alveoli are surrounded by capillaries. Oxygen leaves the lungs and goes in the blood. CO2 leaves the blood and goes into the lungs.

19. Breathing- inhaling and exhaling 20. Cellular Respiration- cells take the Oxygen O2 and food to create/release energy. They then make a waste called Carbon Dioxide CO2.