Matching Activity (1 point each) A. Red blood cells E. Capillaries
B. Alveoli F. Vein
C. Artery G. Trachea
D. Blood Pressure H. White Blood Cells

1. The tube that connects the larynx to the bronchi, also called the windpipe.
2. One of many tiny air sacs at the end of the bronchioles in the lungs that provide surface area for gas exchange to occur with the circulatory system.
3. The force that flowing blood exerts against the wall of a blood vessel.
4. Blood vessels that carry deoxygenated blood from the body back to the heart.
5. Large blood vessels that carry oxygenated blood away from the heart.
6. Microscopic blood vessels that penetrate tissue and allow gas exchange of gases and other substances between the blood and interstitial fluid.
7. Blood cell that contains hemoglobin and carries oxygen.
8. Blood cell that protects against infection and attacks parasites and bacteria.