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Which one of the following has an open circulatory system?

  1. A
    Pheretima
  2. B
    Periplaneta
  3. C
    Hirudinaria
  4. D
    Octopus

Solution & Step-by-step Explanation

Arthropods, including Periplaneta (cockroach), characteristically possess an open circulatory system where hemolymph directly bathes the internal organs in hemocoelic spaces.

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Which one of the following has an open circulatory system?
A
Pheretima
B
Periplaneta
C
Hirudinaria
D
Octopus

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