Multiple choice

Which of these organisms has a closed type of circulatory system?

  1. Cockroach

  2. Earthworm

  3. Mollusc

  4. Scorpion

  5. Insects
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earthworm has closed type of circulatory system. Here blood is pumped through a closed system of arteries, veins, and capillaries. Capillaries surround the organs, making sure that all cells have an equal opportunity for nourishment and removal of their waste products.

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