chapter 3 vocab
| Description: | 5 ATHENA ch 3 Scott Foresman 2008 |
| Category: | Science |
| Created by: | bgagnon on 2008-07-25 |
| vocabulary word | definition |
| artery | a type of blood vessel that carries blood away from the heart to other parts of the body |
| capillary | the smallest kind of blood vessels |
| vein | a type of blood vessel that carries blood from the cells back to the heart |
| valve | an opening that allows blood to flow in one direction but stops it from flowing in the other direction |
| mucus | a sticky, thick fluid that traps dust, germs, and other things that may be in the air |
| trachea | a tube that carries air from the throat to the lungs |
| bronchioles | tubes that branch out from the bronchi |
| air sacs | tiny thin-walled pouches in the lungs |
| esophagus | a tube in the throat with rings of muscle that help you to swallow food |
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