1. Respiratory System

2. What structures does air pass through to get to the lungs?

3. What is the purpose of the respiratory system?
Supply oxygen to the blood
Eliminate carbon diaoxide

4. Nose and Sinuses Air comes in through the nose
Small hairs filter the air
Blood in the lining of the nostrils warms air
Glands produce mucus to trap dust
If air is inhaled through the mouth, the dust can get into the lungs and irritate the respiratory tract
The small air spaces in the nasal cavity are called sinuses
Help moisten the air

5. Inside of the nasal cavity

6. The pharynx
Opens to the nose and the mouth for air to pass as well as food
Tonsils are on both sides of the pharynx
Can get inflmmed

7. Larynx “Adam’s apple” Food and air pass through
Epiglotis- closes off the passage way so food only goes to the esophogus
Also called the voice box

8. The Trachea The base of the larynx joins the trachea
Called the windpipe
Carilage keeps the trachea open
Lined with mucous and cilia

9. Bronchi and Lungs Two branches
Air goes into the bronchi branches to the bronchiloes
Then air goes to the small air sacs (alveoli)
Capillaries surround the alveoli
Oxygen and carbon dioxide diffuse across the membrane