Multiple Choice
A portal system is
A) an area connecting arterioles to venules.
B) a series of vessels that returns blood to the heart in an animal with an open circulatory system.
C) a space within or between organs where blood is allowed to pool.
D) a slightly muscular vessel that has minimal pumping action in an organism with no heart.
E) a vessel or vessels connecting two capillary beds.
Correct Answer:
Verified
Correct Answer:
Verified
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