Open circulatory system is found in:

Practice MCQ for SSC, UPSC, RRB Exams

A. Earthworm and Leech A.
B. Fish and Amphibians B.
C. Humans and Birds C.
D. Cockroach and Pila D.

Correct Answer: D সঠিক উত্তর: D

Explanation ব্যাখ্যা

In an open circulatory system, blood is pumped out of the heart into a large body cavity (hemocoel) where tissues are bathed in blood. This is characteristic of many invertebrates, including Arthropods (like cockroaches) and many Molluscs (like Pila). Earthworms and leeches (Annelida) have a closed circulatory system.

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