Multiple Choice
Which of the following does not characterize open circulatory systems?
A) They include a heart that moves extracellular fluid through vessels.
B) Fluid may return to the heart through ostia.
C) They are present in small aquatic vertebrates.
D) They are found in arthropods and mollusks.
E) Hemolymph percolates through tissues.
Correct Answer:

Verified
Correct Answer:
Verified
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