| 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 |
Spanish 3
