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chapter 3 vocab
5 ATHENA ch 3 Scott Foresman 2008
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 |