1. Respiratory System Your system for breathing

2. Nose

3. Function: Inhales Oxygen (O2) and Exhales Carbon Dioxide (CO2) Uses nose hair (Cilia) to filter dust and germs from entering the lungs Moistens the air Warms air Evidence: Sneezing Boogers Nose Hair (cilia)

4. Mouth

5. Function: Allows more air to come into the body Evidence: Exercise and out of breath = breathe through your mouth Sick and nose is clogged = breathe through your mouth

6. Trachea

7. Function: Brings Oxygen from nose/mouth to the lungs and removes Carbon Dioxide Evidence: X-Ray Tracheotomy

8. Larynx

9. Function: Air vibrates the vocal cords to make noise (talking) Evidence: Put two fingers on voice box and hear and feel it vibrate

10. Diaphragm

11. Function: A muscle that moves up to force air out of the lungs when you exhale And moves down to let extra space in when you inhale Evidence: Lung model Big deep breathe

12. Epiglottis

13. Function: Small flap that covers the trachea when you swallow so food does not get into your lungs Evidence: X-ray video Coughing when something goes down the wrong pipe

14. Bronchi

15. Function: Tubes to take oxygen to alveoli and remove CO 2 from alveoli to exhale Evidence: Bronchitis Animation

16. Alveoli

18. Function: Small sacs that send oxygen to the cells and removes CO 2 from cells Evidence: Animation Class demonstration