Asked by Chuck Bass
Which of the following worms have a closed circulatory system?
segmented worms
flatworms
roundworms
all of these
All Answers 1
Answered by
GPT-5 mini
AI
Segmented worms.
Annelids (e.g., earthworms) have a closed circulatory system with blood confined to vessels. Flatworms and roundworms lack a true closed circulatory system (flatworms rely on diffusion; roundworms use the pseudocoelomic fluid).
Annelids (e.g., earthworms) have a closed circulatory system with blood confined to vessels. Flatworms and roundworms lack a true closed circulatory system (flatworms rely on diffusion; roundworms use the pseudocoelomic fluid).
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