★ Body Systems Quiz
Diffusion is…..
A. something that makes the room smell nice.
B. the movement of a substance (liquids and gasses) from an area of high concentration to an area of low concentration.
C. all to do with expelling waste products from our bodies.
Preview next quiz:
The smallest type of blood vessel is the:
A. nerve
B. vein
C. capillary
D. artery
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