Topics: Respiration, Immune System, Blood Cells Quiz
What is the name of the liquid part of the blood?
A. Platelets
B. Plasma
C. Red blood cells
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Where would you find alveoli and what do they do?
A. In the arteries, they stop the artery from bursting.
B. In the heart, and they stop the blood flowing backwards
C. In the lungs and they are they site of gas exchange