Home Biology Body Fluids and Circulation NCERT Open circulatory system is present in :-
Biology Body Fluids and Circulation NCERT Single Correct MCQ
Published on: August 13, 2026

Open circulatory system is present in :-

A
Annelids and Chordates
B
Annelids and Arthropods
C
Arthropods and Chordates
D
Arthropods and Mollusca

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The open circulatory system is common to molluscs and arthropods. Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.

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