| A | B |
|---|
| Respiratory System | The group of organs that moves oxygen and carbon dioxide in and out of the body |
| Carbon Dioxide | Waste product taken out of the blood and exhaled through the lungs |
| Oxygen | A gas which is necessary for your cells |
| Nose and Mouth | The location where oxygen can enter the body and the incoming air is |
| Pharynx | The upper part of the throat where the nose and mouth join in a tube - Also called the throat |
| Trachea | A tube which is mostly cartilage that leads directly from the throat to the lungs |
| Bronchi | The two tubes that lead from the trachea into the lungs |
| Bronchioles | The smaller branches of the bronchi |
| Alveoli | Tiny air sacs at the end of the bronchioles where oxygen and carbon dioxide is exchanged |
| Capillaries | The tiniest, thinnest blood vessels that allow oxygen and carbon dioxide to pass through the alveoli |
| Lungs | The major organ of the respiratory system, made from smooth muscle |
| Diaphragm | The muscle that moves the lungs up and down, causing you to breathe in and out |
| Mouth | Warms and moistens air entering through here |
| Nose | Warms, filters and moistens air entering through here |
