Respiratory System

By:

Emily Gretak, Emily Schneider, and Mollee Pezold

Inhaling and Exhaling

• When you breathe in the muscles of your diaphragm contract and the diaphragm is pulled downward.

• While this is going on, the rib muscles pull the ribs up and out. Your chest expands and so do your lungs. Then the opposite happens when you breathe out.

Air’s Trip Through the Trachea

• To begin, you breathe in through your nose or mouth and the air goes to the larynx. If you are talking, your vocal cords come together to make sound. If not, the air passes to the trachea. From there, the trachea separates into to bronchial tubes and it’s to the lungs!

Air’s Trip Into the Lungs

• When the air that you have just breathed in reaches the lungs, it spreads into many, many small bronchial tubes. At the end of each of these bronchial tubes there are tiny air sacs. The air goes into them and from then it is sent into the blood stream. The carbon dioxide from the blood is sent into the air sacs and then you breathe out all of the carbon dioxide. After this you breathe in again and the process is repeated, over and over and over.

Things that Harm the Lung

• There are many diseases that can harm the lung such as; asthma, pneumonia,

• tuberculosis, lung cancer, chronic bronchitis, emphysema, choking, and the number one is SMOKING!

Diseased Lungs

• The lung is unhealthy or diseased when a person is having difficulty breathing, a bluish color around the mouth, inside the lips, or on fingernails. This indicates lack of oxygen.

How to Keep it Healthy

• You can keep the respiratory system healthy by; not working in dusty shops, factories, mines, not breathing high amounts of foreign substances, and by NOT SMOKING!

Sources

• All About the Human Body

• ABC’s of the Body• www.kidshealth.com• www.google.com• ADAM• Encarta• www.brainpop.com