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Letts:Science Chap.3

Science Chapter 3 Vocabulary

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
Created by: letts