MediumZoologyBody fluid and circulation
+4 / -1
Open circulatory system is seen in:
A
Arthropods and annelids
B
Arthropods and molluscs
C
Molluscs and annelids
D
Annelids and chordates
Explanation
In an open circulatory system, blood pumped by the heart passes through large vessels into open spaces or body cavities called sinuses. This is typical of arthropods and most molluscs.
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