Question

Which of the following does not have an open circulatory system?
a. Frog
b. Earthworm
c. Pigeon
d. Cockroach

Answer 1

I think it's frog.Let my answer help you.1 think I am not that sure

Answer 2

d. Cockroach

Explanation:

• The open circulatory system is the system of circulation of blood and other fluids in which the blood vessels are absent and the blood is transferred directly to the required places from the digestive tract.
• The cockroach is an insect and most of the insects have the open circulatory system. It lacks the blood vessels for the transfer of blood and it just have heart and aorta for blood circulation.
• The heart is supplied by the short narrow tube which is aorta.

Learn more about open circulatory system:

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