Question Detail
Question
This is an organism that possesses an opened circulatory system.
Correct Answer
Option B is the correct answer.
Detailed Explanation
In an open circulatory system, blood (or hemolymph) is pumped into body cavities, bathing the organs directly, rather than remaining confined within vessels. Most molluscs (except cephalopods) have an open circulatory system. Cows, birds, and fish are vertebrates, all of which possess a closed circulatory system where blood remains within a network of blood vessels.
Hint
Recall the distinction between open and closed circulatory systems and which major animal phyla exhibit them.