★ Transport System in Man Quiz
Which of the following has walls that are one cell thick and is a site for diffusion?
A. Vein
B. Artery
C. Capillary
D. Aorta
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Plasma function
A. Liquid portion of your blood that transports water and nutrients
B. Liquid part of your blood in which red cells and platelets float
C. Manufacture, waste cleanup, and routine maintenance
D. Remove carbon dioxide from your body
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