Letts:Science Chap.3 Word Scramble
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Question | Answer |
artery | blood vessels that carry blood AWAY from the heart to other parts of the body |
capillary | the smallest kind of blood vessel |
vein | blood vessels that take blood from cells BACK to the heart |
valve | flaps that act ike doors to keep the blood flowing in one 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 larynx to the lungs |
bronchioles | tubes in the lungs that branch into smaller and smaller tubes |
air sacs | where oxygen enters the blood and carbon dioxide leaves the blood |
esophagus | a tube that carries food to the stomach |
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