Parts of the Respiratory System.

1.Mouth and Nose: Air entre to the body through the mouth and nose.

2.Trachea: This are a long, rigid tube conected to our mouth, nose and two bronchi. Air travel down the trachea and into the bronchi.

3.Lungs: This are two lrge bags, that are conected to the bronchi.

4.Bronchi: This are smaller tubes that are conected to the trachea and the lungs.

5.Bronchioles: These are small tubes inside the lungs.They have tiny sacs at the end called alveoli.The air goes to the alveoli and and then pass into the blood vessels.

6.Diaphragm: These is a dome-shaped muscle found the lungs. It contracts to pull air into our lungs; and relaxes to allow us expel waste gases.

Check out this video in spanish about the respiaratory system.