A) Closed systems rely exclusively on simple diffusion for transport, whereas open systems rely on pumping mechanisms.
B) Transport within closed systems is more rapid than in open systems.
C) Blood can easily be directed to specific areas in closed systems, but not in open systems.
D) Closed systems operate better under higher pressure than do open systems.
Correct Answer: A
Solution :
[a] Both closed systems and open systems rely on pumping mechanisms to distribute fluid throughout the body.
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